In the debate on how we ought to define political freedom, some definitions are criticized for implying that no one can ever be free perform any action. this paper, I show possibility of freedom depends a definition finds an appropriate balance between absence interference and protection against interference. To assess different conceptions consider trade-offs they make these two dimensions. fi...

intra-industry trade (iit) comprises of instantaneous imports and exports of goods and services which are handled in a same industry. the importance of iit between trading partners refers to those tradable products that provide them with diversity and high technology. to expand its foreign trade relations, iran indeed requires such trade patterns that include diversification of goods and servic...

Differences in body sizes may create a trade-off between foraging efficiency (foraging gains/costs) and access to resources. Such a trade-off provides a potential mechanism for ecologically similar species to coexist on one resource. We explored this hypothesis for tundra (Cygnus columbianus) and trumpeter swans (Cygnus buccinator), a federally protected species, feeding solely on sago pondweed...