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| Author: | Gollop, F. M. Monahan, J. L. |
| Title: | A generalized index of diversification: trends in U.S. manufacturing. |
| Journal: | Review of Economics and Statistics
1991 : MAY, VOL. 73:2, p. 318-330 |
| Index terms: | MANUFACTURING INDUSTRY DIVERSIFICATION |
| Language: | eng |
| Abstract: | An index of diversification suitable for manufacturing plants and firms is defined as a function of product number, distribution, and dissimilarity. A novel feature of the index is its continuous treatment of product heterogeneity. The index is contstructed for each establishment and each enterprise surveyed in the 1963-1982 censuses. Results are reported at the 2-digit SIC level. While quantifying the upward trend in enterprise diversification, the index reveals an ubiquitous and persistent decline in establishment diversification. Over time, enterprises are shifting toward a more diverse portfolio of increasingly homogeneous plants. Technical economies of scope appear to play little role in the increase in enterprise diversification. |
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