Research on Capital Controls in Chile Show That

Research on capital controls in Chile show that

A) capital controls incur relative small welfare costs but are largely ineffective.
B) capital controls incur large welfare costs and are generally effective.
C) capital controls are generally effective and should be implemented in certain countries.
D) capital controls were effective in Chile but are unlikely to be so in other parts of the world.
E) capital controls should remain in place in Chile.