In gadget production the marginal product of capital is 4 and the marginal product of labor is 2. In widget production, the marginal product of capital is 8 and the marginal product of labor is 4. Based on this information, what can we conclude about economic efficiency?

There is no change that will increase economic efficiency.
Economic efficiency rises if labor is shifted from gadgets to widgets.
Economic efficiency rises if labor is shifted from widgets to gadgets.
Economic efficiency rises if both labor and capital are shifted from widgets to gadgets.
Economic efficiency rises if both labor and capital are shifted from gadgets to widgets.


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