Suppose there are two countries, A and B. Which of the following assumptions are consistent with country A being the technological leader, and country B being the follower?

Check all that apply.

a. The fraction of workers working in creating new technologies in country A < the fraction of workers creating new technologies in country B.

b. Productivity in country A Productivity in country B

c. Productivity in country A < Productivity in country B

d. Fraction of workers working in creating new technologies in country A Fraction of workers creating new technologies in country B.