Economic History Association Political Shocks and Investment: Some Evidence from the 1930s Author(s): Thomas Mayer and Monojit Chatterji Source: The Journal of Economic History, Vol. 45, No. 4 (Dec., 1985), pp. 913-924 Published by: Cambridge University Press on behalf of the Economic History Association Stable URL: http://www.jstor.org/stable/2121886 Accessed: 26/03/2010 00:18 Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive only for your personal, non-commercial use. Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at http://www.jstor.org/action/showPublisher?publisherCode=cup. Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission. JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Cambridge University Press and Economic History Association are collaborating with JSTOR to digitize, preserve and extend access to The Journal of Economic History. http://www.jstor.org Political Shocks and Investment: Some Evidence from the 1930s THOMAS MAYER AND MONOJITCHATTERJI There has been some dispute about the impact of New Deal policies on the business climate. Some historians have argued that the New Deal frightened business, and others that it encouragedbusiness. This paperanalyzes the impact of the New Deal on business investmentby lookingat the response of investment to the outcome of the 1934, 1936, and 1938 elections, as well as the passage of certain New Deal legislation. The data reject the hypothesis that the New Deal frightenedoff business investment. ONE explanationfor the low level of investment duringthe 1930sis that business was frightenedby New Deal legislation and rhetoric. This hypothesis, which received much credence duringthe 1930s, has been recently accepted by some economic historians but rejected by others.' On one side of the dispute there is Herman Krooss' view that: The businessmen,who had at firstwelcomedRoosevelt's iconoclasticpragmatism,soon came to regardit as at best infra-dig,and at worst as a sin against eternal truth.... Business leaders found much of the first New Deal to their liking;they were not happy with the second one, and they thoroughlydetested the third.2 Similarly,Arthur Schlesinger, Jr. writes that the mania against Roosevelt "was a disease of the rentier class. . . . They were frightenedas new forces boiled up from the lower depth. Everything they stood for seemed under mortal attack."3 Frederick Allen states that "the financial community ... had become an almost solid anti-Roosevelt phalanx.... [In the] winter 1933-34 ... what wild schemes, they asked one another, would this man hatch next?"4 George Wolfskill and John Hudson assert that " 'standing behind Roosevelt' was a position in Journal of Economic History, Vol. XLV, No. 4 (Dec. 1985). ? The Economic History Association.All rightsreserved. ISSN 0022-0507. Thomas Mayer is Professor of Economics, University of California,Davis, California95616; MonojitChatterjiis Lecturerin Economics, Universityof Essex, WivenhoePark,Colchester,C04 SQ, England. At the time this paper was written Monojit Chatterjiwas a Visiting Associate Professorof Economics at the Universityof California,Davis. We are indebtedfor excellent commentsto PeterLindertandto two anonymousrefereesfor this JOURNAL, as well as to participantsin the All-U.C. Group in Economic History, and for able researchassistance to Ray Pfingstenand Adil Taha. ' See Herbert Stein,. The Fiscal Revolution in America (Chicago, 1969), p. 89; Herman Krooss, ExecutiveOpinion(New York, 1970),pp. 189-90 and 199. 2 HermanKrooss, Executive Opinion, pp. 161-62, 183. ArthurSchlesinger,Jr., The Coming of the New Deal (New York, 1959), p. 569. 4 FrederickAllen, Since Yesterday(New York, 1940),pp. 166-67. 913 914 Mayer and Chatterji which businessmen and the well-to-do were rarely found."5 William Leuchtenbergprovides a similarpicture: Terrifiedby the prospect of confiscatory taxation, the wealthy viewed Roosevelt as a reckless leveler . .. Many businessmenwere openly defiant.ArthurYoung, U.S. Steel vice-presidentin chargeof industrialrelations,told the AmericanManagementAssociation that ratherthan obey the Wagnerbill he would "go to jail or be convicted as a felon."6 This view has become incorporatedin textbooks, such as that by Gary Walton and Ross Robertson, who contend that "distrust of New Deal reformsin general and of tax policies in particularmay have weakened individualincentives to carry out real investment and thus contributed to the downturnof 1937 to 1938."7 But this view has not gone unchallenged. Thus Stephen DeCanio concluded from an econometric study of expectational effects that the New Deal helped restore business confidence.8This belief is also found in some textbooks. Thus Harry Schreiber, Harold Vatter, and Harold Faulknerwrite that the improvementin the economy at the start of the second quarterof 1933 was due in part to "the improvementof morale and the restorationof confidence inspired by the President's quick and able handling of the bank crisis and his activity in attacking the depression on many fronts."9 Similarly, W. Elliot Brownlee points out that the U.S. Chamberof Commerce and the National Association of Manufacturers (N.A.M.) supported the National Recovery Act (N. R. A.). 10 Macroeconomists, not only economic historians, have discussed the issue of business confidence during the Depression. Thus Milton Friedmanand Anna J. Schwartz argue that: Business confidence ... was weakened still furtherby these and other measures:some regulatingbusiness (such as the SecuritiesAct of 1933and the SecuritiesExchangeAct of 1934,the divorce of investmentbankingfromcommercialbanking. .. restrictionson publicutility holdingscompanies . . ) others expandedgovernmentactivitiesinto areas up to then reserved mostly for private enterprise . .. ; still others seeming to threaten the sanctity of private contracts and property . . . The effects of these measures were exacerbated by the deliberate maintenanceof an unbalancedbudget, by attacks on "economic royalists" and "monopoly" ... and by the President's proposal to reorganizethe SupremeCourt." s George Wolfskilland John Hudson, All But the People (New York, 1969),pp. 144, 146, 157. WilliamLeuchtenburg,Franklin D. Roosevelt and the New Deal (New York, 1963),pp. 17677. 7 Gary Waltonand Ross Robertson, History of the AmericanEconomy (New York, 1983),p. 926. 8 StephenDeCanio, "Expectationsand Business ConfidenceDuringthe Great Depression,"in BarrySiegel, Money in Crisis (Cambridge,Mass., 1984),pp. 157-76. 9 Harry Schreiber, Harold Vatter, and Harold Faulkner,American Economic History (New York, 1976),p. 367. 6 10 W. Elliot Brownlee, The Dynamics of Ascent: A History of the American Economy (New York, 1977),p. 300. " Milton Friedman and Anna J. Schwartz, A Monetary History of the United States (Princeton, 1963),pp. 495-96. Political Shocks and Investment 915 Allan Meltzer expressed a similar opinion: the taxation of undistributed profits, higher income taxes, the Wagner Act, the regulationof wages and hours of work, growingregulationof business, rhetoricabout "economic royalists" . . . are among the government actions reducingincentives to invest or contributingto uncertaintyabout the future. Jacob VinerwarnedRoosevelt at the time thathis criticismsof businessmenand his policies towardsbusiness reducedthe effect of his spendingpolicies on investment.'2 The focus in this article is on the actions, ratherthan the rhetoric, of the business community. Our central concern is: Did the New Deal's political and psychological shocks to business reduce investment? THE PROCEDURE A simple way to test the political-shock hypothesis is to regress a measure of investment activity on appropriate dummy variables for these shocks, holding other variables constant. The appropriatemeasure of investment must be closer in time to the investment decision than the "value put in place" that enters the nationalincome accounts. Due to lags in the investment process value put in place at one time reflects an investment climate aggregatedacross the past and is hardto correlatewith specific shocks in time. To overcome this problemwe use construction contracts let for nonresidentialbuildings, as well as new orders and the dollar value of unfilled orders for certain types of industrial equipment. Unfilled orders are a better measure in one respect than new orders because they take into account the cancellation of old orders that might occur as a result of political shocks.'3 But unfilledorders are also an inferiormeasure because they depend on the speed with which previously-placed orders are filled which, in turn, depends on the extent of excess capacity. But it will not be necessary to choose between the two series because they lead to the same conclusion as we later show. The specified types of investment covered are nonresidentialbuildings (measuredin dollar value and square feet), machine tools, electric overhead cranes, electric motors, foundry equipment, and woodworking machines. The period covered is 1925to 1938, except for the dollar value of nonresidentialbuildingcontracts and electric motors for which the data start in 1926, and for unfilled orders for electric overhead cranes for which the data commence only in the following year.'4 The 12 Allan Meltzer, "Commentson 'MonetaristInterpretationsof the GreatDepression' " in Karl Brunner, ed., The Great Depression Revisited (Boston, 1981), p. 151. 13 Moreover, unfilledorders also take into account the possibility that supplyingfirms, afraid that the political shock will cause the cancellation of previously-placedorders, speed up their shipments. 14 For electricalmotors no data on unfilledorders are available;hence data on shipmentswere used instead.For machinetools only new orderscould be used. Since as discussedbelow, in some regressions one lagged dependent variable and in other regressions three lagged dependent variableswere used, the actualperiodfor which the regressionswere runstartseitherone quarter or three quarterslater. Mayer and Chatterji 916 Departmentof Commerce data used are monthly, but to reduce erratic fluctuationsthey were aggregatedinto quarterlydata.'5 The standard procedure to test the shock hypothesis would be to select one or several investmentfunctions and add dummiesfor political shocks. Three major investment theories-the accelerator theory, the cost-of-capitaltheory and the neoclassical theory, which integratesthe other two-can be used to generate an investment function. The accelerator theory is not applicable to the 1930s. It is most directly a theory of investment for the individualfirm.Applyingit to the whole economy raises an aggregationproblem; the response of investment to increases in demand depends upon the distributionof demand between firmswith and without excess capacity because the accelerator theorem is not applicable if there is excess capacity. In normal times, when excess capacity is relatively low, the aggregationproblemcan be ignored, this is hardly the case for the 1930s. Second, expected future demand (not current demand) determines investment. During normal periods this problem can be overcome by using an adaptive expectations model or a rational expectations model. But for the disturbed conditions of the 1930s, such models are less plausible. Given the unprecedentedseverity of the Depression, firms are not likely to have projected past conditions mechanically. Nor are they likely to have relied on a relatively simple implicit model that explained demand in a previous period. A cost-of-capital approach to investment in the 1930s is not feasible either because the expected real rate of interest is difficultto measure. The GNP deflatorfell by 22 percent from 1929to 1933and by 1939had risen again by 10 percent. With rapidly fluctuatingprice changes the expected inflation rate was probably a major determinant of the expected real interest rate, but it is hard to imagine how an accurate estimate of price expectations could have been developed. 6 Moreover, at a time of massive business failures the cost of capital is hard to measure.The interest rate understatesthe cost of borrowingby omitting the increased risk of failure from higher leverage and is therefore not a good measure of the cost of capital. Various conventional investment equations based on these theories have been fitted and reviewed in an excellent dissertation by Pauline 1s The data come from U.S. Departmentof Commerce, Commerce Yearbook,(Washington, D.C., 1932); and Survey of Current Business; Supplement (Washington, D.C., 1936, 1938, 1942). There is, of course, a dangerof too much aggregation.However given our autogressiveapproach monthlydata are not practicable.To generatelaggedvariablescoveringone year, we would need 12 lagged(monthly)variables,and this could producetoo much multicollinearity.Aggregationof quarterlydata is simpleway of reducingsevere multicollinearity.Furthermorethe use of quarterly data allows for short (3 months)lags in the effect of politicalshocks should they exist. 16 Thereis no reason to assume that a regressionthat explainsprice expectationsin the postwar period also explains price expectations in the 1930s. See Peter Temin's largely qualitative discussion of price expectations in his Did Monetary Forces Cause the Great Depression? (New York, 1976),pp. 160-64. Political Shocks and Investment 917 Andrews.17 Such equations have to be employed if one wants to explain investment econometrically despite the problemsjust discussed. However, our task is not to explain investment, but merely to investigate the impact of political shocks. For this we can proxy the effect of all other variablesby the lagged dependentvariable.'8Hence we employ a thirdorder autoregressive equation.'9 The justifications for autoregressive procedures (or a time-series model) are first that autoregressive equations generally predict at least as well as structuralequations do, and second, that one avoids havingto make specific assumptionsabout structuralrelationships.20The case for using autoregressiveequations is thereforemost compellingwhen, as in the case here, there is considerableuncertaintyabout the true structural model. The autoregressive equation can then be thought of as an approximationto the reduced form. For example, let Yt= ax, (1) be the "true" structuralmodel and assume one is unsure about what x, is. It may be plausible to model the exogenous variablesx, as: x, = p1Xt1 + P2Xt-2 (2) The reduced form of equations I and 2 is: Yt = PlYt-i + P2Yt-2 (3) The argumentis easily generalized to higher dimensions. The assumption-that the unmeasured factors determining investment in one period also do so in the next period-is plausible because the data used are quarterly, and, as shown below, such autoregressive equations provide good fits. There is the danger that due to sheer coincidence, innovations in the variables that drive investment (which are not caught by the autoregressiveterms) mightbe correlatedwith the political-shock dummies. If so, the dummies would not provide an adequatetest of the political-shockhypothesis. We reduce the chance of a coincidence by using six dummies. 17 PaulineAndrews, "Manufacturing Fixed Investmentand the GreatDepression"(Ph.D. diss., Universityof California,Berkeley, 1982). 18 The coefficientsof the laggeddependentvariablespick up the impactsof those variablesthat affect investmentfor more than one period. The impact of those that affect investmentin only a single quarterbecomes partof the errorterm. 19The choice of third-orderequations is arbitrary,but the results are similar if first-order equationsare used instead. 20 An excellent discussion of the properuse of time-seriesmodels is in 0. D. Anderson, Time Series Analysisand Forecasting(Borough,Green, Kent, England,1977).Morerecentlythe use of time series methods has been given prominencein macroeconomicmodeling.Thus Christopher Sims in "Macroeconomics and Reality," Econometrica, 48 (Jan. 1980), pp. 1-49 says " . . . one can obtain macroeconomicmodels with useful descriptivecharacteristics,within which tests of economicallymeaningfulhypothesescan be executed, withoutas muchof a burdenof maintained hypotheses as is usually imposed in such modeling." 918 Mayer and Chatterji A more serious problem is that investment was so low in the 1930s that much of it presumablyconsisted of replacingworn-out equipment to keep factories running. Such investment is less likely to be sensitive to political shocks than is, say, the construction of an entirely new plant. But surely not all investment was replacement for existing equipment. THE POLITICAL SHOCKS Not all political shocks provide a suitable test.2' To do so they must meet four criteria. First, they must be important, so that one can reasonably expect them to show up in the investment data. Second, they must be genuine shocks, that is unanticipatedevents. Third, the direction of their effect on investment must be clear. For example, the passage of the N.R.A. does not qualify because it is unclear whether business treated it as favorable or unfavorablenews. Fourth, the shock must have occurred at a distinct date. The fact that many shocks occurredalmost simultaneouslycreates a problem. Because it is impossible to disentangle the effects of any particularshock, they must be treated as a unit. One set of events that meets the above criteriais the election results in 1934, 1936, and 1938. Even the 1934mid-termelection was important because it affected the extent to which the President could get his program through Congress; despite a large Democratic majority a strengthened alliance between Republicans and Southern Democrats could weaken the President's control. Moreover, at least in 1934 and 1936, the election results were unexpected. While, with hindsight, one might have expected the Democrats to do well, the extent of their victory was unanticipated. According to Time, before the 1934 election "it was generally agreed that the Republicanswould probablylose anywhere up to five or more seats in the Senate and could consider themselves most lucky if they maintained their present piffling strength in the House."22 But what actually happened was "the first time in [American] history that the increased its Congressional strength in an off-year party in power . election.'"23 The 1936election results were also a surprisebecause prior to the election public opinion polls were split.24Roosevelt's victory was overwhelming,and Timecalled it "the greatest landslide since 1820."25 21 Since there were many shocks during the 1930s there is a danger that the political-shock hypothesiscould be force-fittedby experimentingwith enoughsets of shocks untilone set happens to fit. To avoid this the politicalshocks used were selected withoutlookingat the data and before runningany of the regressions. The only regressionsthat were run are those shown, except for some runs that containederrors. 22 Nov. 5, 1934, p. 12. 23 Newsweek, Nov. 17, 1934, p. 7. 24 ArchibaldCrossley, "Straw Polls in 1936," Public OpinionQuarterly,1 (Jan. 1937),pp. 2435. 25 Nov. 9, 1936, p. 24. Political Shocks and Investment 919 In the 1938election the Republicansnetted 81 House seats and 8 seats in the Senate as well as 13 governorships, polling 47 percent of the House vote as compared to 40 percent in the previous election. Althoughthe Democrats continuedto hold a comfortablemajorityin the House and two-thirds of the. Senate, the consequences were "disastrous" for the New Deal owing to a coalition of Southern Democrats and Republicans.26The extent to which these results were anticipatedis unclear, but given the poor record of election forecasts in 1934and 1936 the actual results in 1938must surely have provided some new information. Accordingly, all three elections are treated as shocks, and dummy variablesare assigned to the last quartersof 1934, 1936, and 1938.27The shock hypothesis requires that the first two dummies have negative coefficients and the third one a positive coefficient. To obtain the other shocks we selected three events described by historians as particularly severe blows to business. The selection of certain events as majorpolitical shocks is inevitably subjective. Those who believe we have not selected the correct shocks may therefore want to look only at the results obtained for the three elections. The first of the other three shocks is a compound of several events that occurred in the period March to June 1933. In March 1933 the United States left the gold standard.In April 1933President Roosevelt sent the Tennessee Valley Authority (TVA) bill to Congress which passed it in May. The President also sent the AgriculturalAdjustment Act to Congress in April, and it too was passed in May. This act included the Thomas Amendment authorizingthe issue of $3 billion of additionalcurrencywithout gold backing, a measurebitterlydenounced as inflationaryand extremely dangerous.The N.R.A. was introducedin Congress in May 1933 and was passed the following month. A dummy shock variablewas therefore allocated to the second and thirdquarters of 1933. The next shock consists of several events between May and August 1935, and a dummy variable was assigned to the second and third quartersof 1935. One was the passage in May of the WagnerAct which greatly furtheredunionization and which Leuchtenburgcalled "one of the most dramaticlegislative innovations of the decade."28John Major termed the President's supportof the WagnerAct "a slap in the face of business," and Dexter Perkins reportedthat "no legislation of the New Deal period met with more determined opposition.... It is safe to say that large elements of the business classes, hitherto critical, but not violently hostile to the Administration,were alienated by the law."29 26 27 William Leuchtenburg, Franklin D. Roosevelt and the New Deal, p. 273. Because the dummyvariableswere used only for the quarterin which the election occured, the shocks tested are the immediateshocks. 28 William Leuchtenburg, Franklin D. Roosevelt and the New Deal, p. 151. 29 JohnMajor,The New Deal (London, 1968),p. 196;Dexter Perkins,The New Age of Franklin Roosevelt 1932-45 (Chicago, 1957), p. 39. 920 Mayer and Chatterji The next month "Roosevelt jolted conservatives by firingat Congress a radicaltax message which aimed to redistributewealth and power. . " Roosevelt's tax proposal, which Herbert Stein called a "big step in the escalation of conflict between the administrationand business," raised, according to Leuchtenburg, "an outcry from business and the press such as had greeted none of the President's previous recommendations."30The President also sent to Congress a bill to phase out public utility holding companies, and this too must have shaken business confidence, even though the House watered it down somewhat before passing it in August. The only victory for business in the period was the Supreme Court's invalidation of the N.R.A., a fact which "most industrialistscheered.",31 Another shock occurred in January 1937 when workers at General Motors went on a sit-down strike. On February 11, 1937, General Motors surrendered,and less than a month afterwardsU.S. Steel also surrenderedto a sit-down strike. According to Leuchtenburg: Althoughemployerswere outraged,PresidentRoosevelt would not use force to oust the sit-downers . . . Foes of the sit-down strike believed that Roosevelt, in refusing to employ force, was condoningan assault on propertyrightsby lower-classrebels at the very moment he was attackingthe sacred institutionof the SupremeCourt.32 Thus there are six dummy variables, two of them extendingover two quarters.33Three of the six are election results, and one of these, the 1938election, provides the only favorable shock. While one or more of the shocks used can be questioned, our results do not requirethat each event was actually a shock. RESULTS The results in Table 1 fail to supportthe political-shockhypothesis.34 Considerfirst all the unfavorableshocks, that is the firstfive. Instead of 30 HerbertStein, 1969,The Fiscal Revolution in America, p. 81; WilliamLeuchtenburg,Franklin D. Roosevelt and the New Deal, p. 152. 31 Newsweek, June 8, 1935, p. 5. 32 WilliamLeuchtenburg,Franklin D. Roosevelt and the New Deal, pp. 242-43. 33 In principlenot all six shocks are independent.Suppose a negative shock in, say 1936-IV, reduces investmentfor that quarteronly. In the followingquarter,in the absence of new shocks, investment returns to its previous level but the autoregressivemethod used here predicts that investmentwill be lower. Suppose furtherthat there is anothernegative shock in 1937-I,which does affect investmentin that quarter.Since investmentis underpredictedby the autoregressive terms, the coefficientof the dummyvariablefor the 1937-Ishock is then biased. Fortunatelythis is not a problemhere since it turnsout thatnone of the shocks-with the possibleexceptionof the last one-had any effect on investment. 34 In a previoustest of the political-shockhypothesisArthurSmithies,"The AmericanEconomy in the Thirties,"AmericanEconomic Review, 36 (May 1964),pp. 11-27, looked at the residuals fromregressionsfor plantandequipmentinvestmentandfromresidentialconstructionregressions. He too concludedthat these residualsgive no supportto the shock hypothesis.However, such an approachis model-specific,and the models used by Smithiesin 1946are now outdated. Political Shocks and Investment 3 . 0 00 D CT _ f - -- - t - t : e~~~~~~~~~~~~~~~~~ N o b t t - m \f:> ~~~~~~~~~cr N O Xq > e es \es z~ C ~ ~~~~0 _ l 921 (O. (N (N _ crE _ 00 (O _ (ON r - (ON 00 N 00 es-(O _ m 0un ?0C) \D 1_ ~~~~~~~~~~~~~~~~~~ C of m t 0t C)CD :E (ON C-O) ) en z ? 2e Oel, -? ? E ? . B; E = e E~~~~~~~~~~~~~~~~(O t 922 Mayer and Chatterji being negative, as the political-shockhypothesis implies, the majorityof the coefficients are positive. The sixth shock, the Republicansuccess in the 1938 mid-term elections, presents a somewhat different picture. Here all ten coefficients have the correct sign and two are significantat the 1 percent level, though the significancelevels are overstated by the inclusion in the regressions of the lagged dependent variable.35Even ignoring the bias caused by the inclusion of the lagged dependent variable, two significantcoefficients out of the eleven is hardlya strong showing. In any case, the 1938 election is only one of the six shocks considered. The political-shock hypothesis can hardlyclaim credibility because it is consistent with the data in one of six cases. Is it reasonable to argue that while the other shocks had no effect on investment, the 1938election did so? And can one go furtherand argue that the New Deal shocks to confidence were significant because a weakened New Deal in 1938did affect investment?Such an argumentis hard to accept for two reasons. First, while the 1938 election shows a more favorableresult for the shock hypothesis thando the other shocks, even this result does not support the shock hypothesis strongly. Few coefficients are significant,and five are less than their standarderrors. Second, if elections were so importantbecause they portendedshocks yet to come, then the political-shock hypothesis must be rejected because it fails in the other two elections.36 ROBUSTNESS TESTS The results shown in Table I come from regressions fitted to data from the 1920s as well as the 1930s. Because the underlyingimplicit structuralequations may well have differedin the 1920sand 1930s, it is useful to see if similarresults are obtained if these regressionsare fitted only for the 1930s. As Table 2 shows, this is so. In the regressions of both Tables I and 2 the choice of using three autoregressive terms was arbitrary.Hence, we ran alternative regressions using only a single autoregressiveterm. The results, available on request, are similarto those in Table 1. However, given the low values of the Durbin-Watsonstatistics when only a single autoregressiveterm is used, we suggest that the third-orderautoregressiveprocess captures the complexity of the investment process more accurately. 35 Both significantresults are for nonresidentialbuildingcontracts,and may be due to a special situationin the nonresidentialbuildingindustry. 36 Since our results reject the null hypothesis, we are not subject to a standardcriticism of econometric results; the improperuse of significancetests whereby failure to reject the null hypothesisis seen as acceptingthe null hypothesisas true. Of course in alternativespecifications the test outcome could have been different. However, our procedureis sufficientlygeneral to encompass a wide variety of alternative specifications. This problem, known as Duhem's irrefutabilitythesis is unavoidablein scientificwork. See MarkBlaugh,Methodologyin Economics (Cambridge,1980),pp. 17-18. 923 Political Shocks and Investment to 00 0 /) st vE < -O 'Ict ) o o m b' C) F O I 1-_) | c || | E, - 0o- <- esi e o o- o? o) o O -o} _ o o x s t|X .o ty3~~~~~~~~~~~~~ o c c | Ea _ . . | <~~~~~~~v _ ~ 1- o o o c- CP .4 ef Z~~~~~~~c s - * o -o | v) <_ 2~~~~~~~~~~ = CO) EA00 oF 0.? o o 8 9 3. t c c ? S ~~~~~~~~~~~~ X ? ua 11 r - - - 11 v UJ >CZ - - Y 7 s? 6. 3. t. o 3 p 5 ; ='-2 z = G 0 S c Sz 8 e sx U r @~~~~~~~~~~~ S 924 Mayer and Chatterji CONCLUSIONS We have tested the hypothesis that political shocks were significant factors in generating the low level of investment in the 1930s. The hypothesis is rejectedusing a fairlygeneralmethod, althoughour results do not rule out the possibility that political shocks in other periods or other countries could affect investment adversely.
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