The government spending multiplier is equal to the tax multiplier

In the Solow model, if f(k) = 2k0.5, s = 0.25, n = 0.1, and d = 0.4, what is the value of k at equilibrium?

A) 1 B) 2 C) 3 D) 4

Using the above figure, which of the lines in the above diagram represents a progressive tax?

A) A B) B C) C D) none of them