Insects have evolved an astonishing array of defences to ward off enemies. Well known and widespread is the regurgitation of oral secretion (OS), fluid that repels attacking predators. In herbivores, the effectiveness of OS has been ascribed so far to the presence of deterrent secondary metabolites sequestered from the host plant. This notion implies, however, that generalists experience less p...

Cliff swallows (Petrochelidon pyrrhonota) are migratory birds that breed in colonies and frequently nest on highway structures. Protected by the Migratory Bird Treaty Act of 1918, swallows in their active nests cannot be harmed by nesting-control methods. This causes problems and delays in maintenance of structures by divisions of many departments of transportation. We evaluated 2 aversion stra...

PURPOSE This study examined issues related to using older workers in frontline jobs in long-term care from employers' and prospective employees' perspectives. DESIGN AND METHODS Telephone surveys were conducted with employers representing 615 nursing homes and 410 home health agencies, and 1,091 low-income participants aged 40+ in Operation ABLE employment and training organizations. A total ...

We examine the causal effect of unionization on a firm’s takeover exposure and merger gains. To establish causality, we use a regression discontinuity design that relies on “locally” exogenous variation generated by elections that pass or fail by a small margin of votes. Barely passing a union election leads to a significant reduction in a firm’s probability of receiving takeover bids. Conditio...