We investigated the contribution of cognitive ability and affect to age differences in sequential decision making by asking younger and older adults to shop for items in a computerized sequential decision-making task. Older adults performed poorly compared to younger adults partly due to searching too few options. An analysis of the decision process with a formal model suggested that older adul...

This study investigates a relationship between free access to research articles and the diffusion of their ideas as measured by citation counts. By using a dataset from the Social Science Research Network (SSRN), an open repository of research articles, and employing a natural experiment that allows the effect of free access separate from other confounding factors, this study identifies the cau...

Policy-makers and analysts are often concerned with the effect of tariff reductions, as part of trade liberalisation, on the volume of imports, and in particular adverse effects on domestic import-competing sectors. While there is limited evidence at an aggregate country level that imports increase following trade liberalisation, there is very little empirical evidence at a sector level. In the...

OBJECTIVES The sources of age differences in short-term memory for spatial locations were explored in 2 experiments that examined factors related to input, to maintenance, and to output. METHOD In each experiment, 4 dots were presented briefly, followed after a retention interval by a probe dot, which was judged to either match or not match one of the 4 memory-set dots. RESULTS AND DISCUSSI...

Although divided differences of a function are of basic importance in the theory of numerical analysis, they are not nearly as useful as ordinary differences in application. In the first place, they are much harder to generate ; not only because they involve unequal intervals of the argument, but because divisions are involved, often by small numbers. Furthermore, they are harder to interpret t...

Two studies examined age differences in recall and recognition memory for positive, negative, and neutral stimuli. In Study 1, younger, middle-aged, and older adults were shown images on a computer screen and, after a distraction task, were asked first to recall as many as they could and then to identify previously shown images from a set of old and new ones. The relative number of negative ima...