Why might earmarks be a good thing?

What were the social, economic, and political characteristics of spanish and portuguese rule in latin america?

To encourage railroad companies to build railroads across the west, the government gave them subsidies by select the best answer from the choices provided. a. paying the wages of laborers b. giving them building materials c. providing railroad trains d. providing free land

Why would the free rider problem prevent a private business from investing in the building of a city sidewalk?