Determine Which of the following production functions exhibit constant returns to scale (CRS). Hint: if you "scale up" by doubling the inputs used, do you doubles, less than double, or more than double the output?
a) Y=0.5K+0.3L b) Y=(K L)^1/2 c) Y=min{K,0.3 L} d) Y=K^0.3 L^0.5
Another hint: if you get stuck with the algebra, just guess values for K and L, compute output, then try doubling them.