The shift from steam to electric power in manufacturing is recounted. Between 1880 and 1930 the production and distribution of mechanical power rapidly evolved from water and steam prime movers with shaft and belt drive systems to electric motors that drove individual machines. The use of electricity reduced the energy required to drive machinery, but more important, enabled industry to obtain greater output per unit of capital and labor input.Reduced energy needs and increased productivity in manufacturing influenced the relationship between energy consumption and gross national product in the first three decades of the twentieth century.

The paper quantifies the relative manpower costs of the public building programs of the Julio-Claudian emperors of Rome from 29 b.c. to a.d. 68. We used both literary and archaeological sources for obtaining our data. Upon charting the data we discovered that the manpower needs show two peaks, one between 12 b.c. and 3 b.c., the other from a.d. 38–51.

Statistics on crop yields for the period 1268–1430 from 62 demesnes in the eastern half of Norfolk are used to demonstrate a new method of measuring arable productivity. The method takes into account seeding rates, the frequency of cropping, and the relative importance of the different crops grown, and it acknowledges the existence of different farming regions. Within eastern Norfolk two such regions are shown to have existed, which cut right across estate affiliations and had radically different productivities. The wider implications of these findings are then discussed.

Virtually all sectors of the nineteenth-century American economy were less capital-intensive than their British counterparts. This resulted from persistently higher American interest/profit rates, due in turn to American land abundance. The paper adduces the evidence in support of these propositions, and explores their interrelationships through the use of a linear model inspired by the writings of David Ricardo.

This article examines the role of capital-deepening technical change in promoting the growth of large firms and concentrated markets in the late nineteenth-century United States. Translog production functions allowing nonconstant returns to scale and biased technical change are estimated in pooled cross-section time series for 16 major industries over the period 1850–1890 based on Census data. It is shown that substantial increases in optimal firm size, dictating natural monopoly or tight oligopoly market structures, occurred in some but not all of the industries experiencing substantial increases in concentration over this period. In a number of markets high concentration levels did not appear to have been compelled by changes in technology.

The survivor technique is applied to a virtually complete set of plant and output data to determine the extent of scale economies in the plug, smoking, snuff, and fine-cut branches of the tobacco industry between 1897 and 1910. The data indicate that the relative cost advantage of large tobacco factories was substantial, with facilities of minimum efficient size often requiring market shares approaching 10 per cent of U. S. output. These results support one of the principal themes of The Visible Hand—that the realization of scale economies motivated the consolidation movement in American manufacturing at the turn of the century.