Suppose that tattoos gained immense popularity with retired people as well as college students. This gain in popularity best reflects which of the following influences on buying plans?

At low wages, the labor supply curve for most people slopes upward because

A) the demand for labor is perfectly elastic at low wages. B) as wages increase the opportunity cost of leisure increases. C) as wages increase income also increases unless hours worked decrease. D) the supply of labor is perfectly inelastic at low wages.

Suppose the shopkeeper is known to usher low bidders out of the store even if it means giving up the sale. If the customer moves first, he would

a. Offer the high price b. Offer the low price c. Get ushered out of the store d. All of the above