4. Consider country A with a sector characterised by increasing returns to scale, where homogeneous firms produce a differentiated good and operate under monopolistic competition. If the elasticity of substitution (1/ (1 – a)) is constant and higher than one (i.e., a € (0, 1)), bilateral trade liberalisation with country B, characterised by the same preferences and technology, but one third the size of A (LA = 3LB): (a) makes varieties triple in B and welfare increase by less than 50 percent in A (b) makes varieties triple in A and welfare increase by less than 50 percent in B (c) makes varieties double and welfare less than double in both countries (d) none of the above

Principles of Macroeconomics (MindTap Course List)
8th Edition
ISBN:9781305971509
Author:N. Gregory Mankiw
Publisher:N. Gregory Mankiw
Chapter9: Application: International Trade
Section: Chapter Questions
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4. Consider country A with a sector characterised by increasing returns to scale, where homogeneous
firms produce a differentiated good and operate under monopolistic competition. If the elasticity of
substitution (1/ (1 – a)) is constant and higher than one (i.e., a E (0, 1)), bilateral trade liberalisation
with country B, characterised by the same preferences and technology, but one third the size of A
(LA = 3LB):
(a) makes varieties triple in B and welfare increase by less than 50 percent in A
(b) makes varieties triple in A and welfare increase by less than 50 percent in B
(c) makes varieties double and welfare less than double in both countries
(d) none of the above
Transcribed Image Text:4. Consider country A with a sector characterised by increasing returns to scale, where homogeneous firms produce a differentiated good and operate under monopolistic competition. If the elasticity of substitution (1/ (1 – a)) is constant and higher than one (i.e., a E (0, 1)), bilateral trade liberalisation with country B, characterised by the same preferences and technology, but one third the size of A (LA = 3LB): (a) makes varieties triple in B and welfare increase by less than 50 percent in A (b) makes varieties triple in A and welfare increase by less than 50 percent in B (c) makes varieties double and welfare less than double in both countries (d) none of the above
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