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This article examines the unemployment experiences of workers in North Carolina involved in mass layoffs and plant closings, focusing on the differential impacts between black and white workers. The results of this research not only support earlier findings but also suggest that blacks are laid off in numbers disproportionate to their membership in the labor force. Several different explanations for this result are examined and attempts made to control for several of these factors, such as industry and occupational differences. However, even after controlling for such factors, evidence of differential treatment continues to persist.

This article examines the impact of the US Offshore Assembly Provisions (OAP) on the effective tariff rates of the United States. The effects of OAP are incorporated theoretically into the effective rate calculation and the resulting algorithm is then applied to the 245 affected categories in 1974. The results indicate that, with the presence of OAP, ordinary effective rate calculations overstate the protection afforded to value added in US industries. Although the OAP effect was small, greater usage of the available concessions by importers could alter considerably the level and relative industry impact of the US tariff.

This article conceptually extends a previous analysis of the impact of Offshore Assembly Provisions (OAP) upon Effective Rates of Protection (ERPs). Allowance is made for the fact that the OAP incentive to foreign assemblers to use US components will bid up the price of the components. Expressions are obtained for the relationship between the "standard" ERP, the ERP with OAP in effect, and the nominal rate of protection.