The United States produces 41% of the world's corn and 38% of the world's soybeans. These
crops comprise two of the four largest sources of caloric energy produced and are thus …

Poly(ethylene glycol) (PEG) is a highly investigated polymer for the covalent modification of
biological macromolecules and surfaces for many pharmaceutical and biotechnical …

A key question for climate change adaptation is whether existing cropping systems can become
less sensitive to climate variations. We use a field-level data set on maize and soybean …

Statistical studies of rainfed maize yields in the United States 1 and elsewhere 2 have
indicated two clear features: a strong negative yield response to accumulation of temperatures …

This field guide begins with introductory material on the biology of spiders, on methods for
collecting and preserving them, on identification and classification, and includes keys to …

Recent theoretical models of entry predict that, in the presence of sunk costs, current market
participation is affected by prior experience. This paper quantifies the effect of prior …

British arachnology really began with the work of John Blackwall (1788–1881). Before this,
although about fifty British species were recognized by the Latin names given by continental …

This paper is concerned with pollution control when the regulators are uncertain about firms'
cleanup costs. Under these circumstances, the regulatory authority can reduce expected …

… Authors: Marc J Roberts, William Hsiao, Peter Berman, Michael R Reich. Publisher:
Oxford University Press, Oxford; 2003 ISBN: 0-19-516232-3; hardcover, 332 pages; price £29.99 …

This paper estimates a dynamic structural model of a producer's decision to invest in R&D
and export, allowing both choices to endogenously affect the future path of productivity. Using …