is an important determinant of earnings and thus of labor productivity, holding constant employee at-tributes such as age … for estimation of the marginal productivity of workers classified by length of service to the firm, i.e., of the tenure-productivity … changes in labor turnover behavior) on manufacturing productivity performance …

operated. using plant-level Census Bureau data, we show that productivity is inversely related to the degree of diversification …, the lower the productivity of its plants. Hence de-diversification is one of the means by which recent takeovers have … contributed to U.S. productivity growth. We also find that the effectiveness of regulations governing disclosure by companies of …