Who expressed this view? "Unlike the present period, (black) inner-city communities prior to 1960 exhibited the features of social organization—including a sense of community, positive neighborhood identification, and explicit norms and sanctions against aberrant behavior."

Steel workers laid off from their jobs as the result of a recession are considered

A) seasonally unemployed. B) cyclically unemployed. C) frictionally unemployed. D) structurally unemployed.

If an industry has 25 firms that collectively have $150 million in total sales and the top four firms in this industry account for $90 million in sales, what is the concentration ratio of the top four firms in this industry?

A) 42 percent B) 60 percent C) 70 percent D) 80 percent