http://www.jstor.org The Dynamics of Political Support for American Presidents Among Occupational and Partisan Groups Author(s): Douglas A. Hibbs, , R. Douglas Rivers and Nicholas Vasilatos Jr. Source: American Journal of Political Science, Vol. 26, No. 2 (May, 1982), pp. 312-332 Published by: Midwest Political Science Association Stable URL: http://www.jstor.org/stable/2111042 Accessed: 14-08...

This paper studies the optimal direct/indirect tax mix problem when individuals differ in several unobservable characteristics (productivity and endowments). It presents general expressions for the optimal commodity tax rates and proves that contrary to Atkinson and Stiglitz’s (1976) result, differential commodity taxation remains a useful instrument of tax policy even if preferences are separa...

This paper utilizes the Korea Innovation Survey data to find out the determinants of industry-university and industry-GRI (IUG) cooperation and its impact on firm performance. We find first that among determinants of IUG cooperation, traditional firm characteristics variables of sizes and R&D intensity are not significant at all, while the participation at the national R&D project turns out be ...

Recently, we have used the symmetric bracket of vector fields, and developed the notion of the symmetric derivation. Using this machinery, we have defined the concept of symmetric curvature. This concept is natural and is related to the notions divergence and Laplacian of vector fields. This concept is also related to the derivations on the algebra of symmetric forms which has been discu...

Xylem traumatic resin ducts (TRDs) in Douglas-fir form response to mechanical injury, fire, and root pathogens, but it is unknown if these at the stem bark-beetle-associated fungi. Meanwhile, TRDs are rarely documented lodgepole pine. In southern Rocky Mountains, TRD formation two species from sterile (Control) fungal inoculation treatments (Aggressive, Weak (Douglas-fir only)) were compared; p...

polycyclic aromatic hydrocarbons (pahs) are a class of compounds consisting of more than twobenzene rings fused in a linear, angular, or clustered arrangement and do not contain hetero atomsor carry subsistent. pahs originate from various sources. they are primarily formed byincomplete combustion of carbon-containing fuels such as wood, coal, diesel, fat, or tobacco. thepresent study reports an...