Selecting Pesticides and Nonchemical Alternatives: Green Thumbs' Rules of Thumb Decision Tools

This study of a sample of home gardeners indicates that rules of thumb, or heuristics, are used to select between chemical pesticides and nonchemical alternatives. Such rules of thumb serve to simplify otherwise complicated choice decisions. Heuristics commonly used to choose pesticides include how safe, effective, efficacious, and economical they are, whereas for alternative products consumers more often take into account convenience, efficiency, competency, and handiness. Generally, in an overall ranking of 24 individual choice attributes, pesticies rank low on these attributes where alternatives rank high and vice versa. Gender, age, and years using pesticides are significantly correlated with pesticide selection.     

WICKSELL'S INFLATIONARY CREDIT CYCLE

The credit cycle implicit in Wicksell's upward cumulative process (UCP) is described. UCP may be interpreted as a stable cycle with two phases and an upper turning point corresponding to the maximum 2-rate-differential. The volume of credit and the rate of inflation is shown to expand in phase 1 and to contract in phase 2. The role of velocity increasing in causing a higher inflation rate is also described. This cycle has not been noticed in the literature because Lectures(2) was unclear about how long it would take to reach an upper turning point. But, Interest and Prices emphasized that the continuous return of the inflation rate to zero equilibrium would begin after a relatively short period.     

Process simulators for safety

Given the often dangerous nature of large-scale chemical and petroleum-based processes, corporations which operate plants in the hydrocarbon industry must make safety their first priority.     

使比较研究可信

:人们在进行宏观社会现象的研究时,方法上有定性与定量之分。定量分析呈现U字形分布,对极少量的N进行研究有案例分析导向,对极大量的N进行研究不利于认识的深化,因此有必要寻找案例研究与变量导向研究之间的中间路线。组合式研究就有很多独特的优点。