When a good is subsidized by the government, the amount of the good produced or consumed declines

A 10 percent decrease in income decreases the quantity demanded of pizza by 3 percent. The income elasticity of demand for pizza is

A) -0.3. B) 0.3. C) 3.3. D) 10.0.

Which economist introduced the simple trade model and the concept of trade based on comparative advantage?

What will be an ideal response?