We provide evidence that over the past 30 years, U.S. firms have expanded their scope of operations. Increases in scope … and scale were achieved largely without increasing traditional operating segments. Scope expansion significantly increases … that traditional concentration ratios do not capture this expansion of scope and are upward biased. Our findings point to a …

rural areas are investigated by comparing their efficiency and economies of scale and scope. The main results are summarized … areas exhibit relatively larger economies of scope than those in urban areas. These findings indicate clear distinctions …