This paper separates market power and efficiency effects of concentration in a sample of 255 U.S. manufacturing … industries and computes welfare changes from rises in concentration. The empirical findings reveal that in nearly two-third of … the cases, consumers lose as efficiency gains are generally pocketed by the industries. From an aggregate welfare …

This study reports experimental market power and efficiency outcomes for a computational wholesale electricity market … operating in the short run under systematically varied concentration and capacity conditions. The pricing of electricity is …. It is shown that high market efficiency is generally attained, and that market microstructure is strongly predictive for …

Dramatic increases in concentration in the seed business, coupled with aggressive efforts to vertically integrate the …

Meatpacking consolidated rapidly in the last two decades: slaughter plants became much larger, and concentration …

Dramatic increases in concentration in the seed business, coupled with aggressive efforts to vertically integrate the …