THE DEVELOPMENT OF CONTINUOUS CASTING IN THE U. S. STEEL INDUSTRY: COMMENT

In a recent article, Professor Ault has stated that:
studies of the steel industry during the fifties and early sixties have indicated that the major cause of the deterioration of the ability of the U.S. industry to compete was the failure of increases in the productivity of US. steel workers to keep pace with increases in the wages and benefits paid to those workers. One of the principal causes for this lag in productivity was the failure of major U.S. producers to adopt the Basic Oxygen Furnace as rapidly as major foreign producers…despite the fact that the Oxygen converter proved to be capable of producing basic steel products at lower unit cost than any other production technique.     

Continuities in Support for Racial Equality, 1972 to 1976

Capitalizing upon the panel component of the 1972–1976National Election Study, we explore change in white Americans'support for racial equality. Two general propositions regardingindividual change are examined: frustration-aggression theory,which attributes change to the stresses and strains of privatelife; and realistic group conflict theory, which attributeschange to the tangible threats blacks pose to whites' privateinterests. We find intermittent support for the first and virtuallyno support for the second. Much more impressive is the durabilityof opinion on racial equality, the insulation of racial opinionfrom the ostensibly powerful predicaments of private life.     

An infinite class of PBIB designs

In this paper, an infinite class of partially balanced incomplete block (PBIB) designs of m+1 associate classes is constructed through the use of a series of row-orthogonal matrices known as partially balanced orthogonal designs (PBOD) of m-associate classes. For the purpose, a series of PBOD is obtained through a method described herein. An infinite class of regular GD designs is also reported.