PERENNIALLY the subject of a maximum on taxable earnings has been discussed in congressional hearings on the improvement of the social security system. An international comparison of bonthe taxable ceiling functions in certain other countries should be of interest in evaluating the United States maximum, particularly where there are features successful to some extent in coping with similar prob...

We report here on specific ways in which synaptic long-term potentiation (LTP) affects the response selectivity of primary sensory cortical cells. LTP increases synaptic efficacy by incremental "steps," up to a "ceiling" at which additional bursts of afferent stimulation cause no further potentiation. Endogenous and exogenous agents have been shown to modulate these two paramenters of LTP, rais...

Do Unemployment Benefits Increase Unemployment? New Evidence on an Old Question We examine the relationship between unemployment benefits and unemployment using Swedish regional data. To estimate the effect of an increase in unemployment insurance (UI) on unemployment we exploit the ceiling on UI benefits. The benefit ceiling, coupled with the fact that there are regional wage differentials, im...

Portable ceiling lifts are hydraulic lifting devices that assist care staff in moving patients. The portable lifts run along tracks installed in the ceilings of rooms and hallways. The lifts can be easily attached to and detached from the tracks, which allows them to be used in more than one room. Before patients are transferred or repositioned they are put into a sling that is hooked onto the ...