KEMENTERIAN PENDIDIKAN DAN KEBUDAYAAN
DIREKTORAT JENDERAL MANAJEMEN PENDIDIKAN DASAR DAN MENENGAH
DIREKTORAT PEMBINAAN SEKOLAH MENENGAH ATAS
Jl. RS Fatmawati, Cipete, Jakarta Selatan
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Kunci Jawab OSN Ekonomi Provinsi 2014
Nomor
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Nama
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Asal Sekolah
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Provinsi
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3. Key Answer:
1. A. Relationship between X1 and X2: Substitutive
Argument: X1 (supply)↓ then P1↑, unsatisfied consumption of X1 moved to
market of X2 (substituted X1 by X2)caused the demand for X2 increased. Since
X2 (demand) ↑ then P2↑
B. Relationship between X1 and X3: Complementary
Argument: X1 (supply)↓ then P1↑, since X1 (consumed)↓ implied X3
(consumed)↓. Thus X3 (Demand)↓ then P3↓.
C. Relationship between X2 and X3: UNSURE
(Could be Substitutive,
Complementary, or Neutral). It depended on the size of the effect of each relation.
2. If X3 disappeared from market: Only X2 existed (assuming fully complementarities).
Argument: If X3=0 then X1 equals to zero. Thus only X2 existed. Thus demand for
X2 would jump highly.
3. If people’s income increased then demand for each good would increase. Thus
general prices increased. But since the quantity of X1 was limited, so X3
(complementary), then the effect would be accumulated to X2. Thus the demand for
X2 increased much more, as well as its transacted volume.