STEM: I don't know what it is, but I want one In various policy circles involving state governors, the US congress, or high tech industry leaders interested in education, there has been considerable recent excitement about increasing A very serious problem underlies this excitement. Most large companies depend primarily upon new product lines to generate their profits and the US has tied its se...

in order to study the effective factors in sugar beet production, evaluation of technical, allocative and economical efficiency of sugar beet producers in bardsir city, 150 sugar beet producers were questioned by classified method. data were collected through questionnaire forms filled by producers in 2004-05. the stochastic frontier production and cost function method were used to analyze the ...

We use patent citation networks to study the dynamics of technical change in Ethernet, a standard for data communication. We first consider the evolution of the broad technological system of Local Area Networks (LANs) and we identify the most significant inventions within the specific subfield of Ethernet. Then we analyse the structure of connectivity of patent citation networks to reconstruct ...

results of an evaluation of the impact of agricultural science and technology (as and t) policy system institutions on efficiency and technical change in kenyan and ugandan agriculture are presented here. data envelopment analysis was used to derive efficiency and technical change and logistic regression applied to delineate as and t institutions that induced efficiency and technical progress. ...