Why are estimates of agricultural supply response so variable?

Why Are Estimates of Agricultural Supply Response so Variable?

Estimates of the response of agricultural supply to movements in expected price display curiously large variation across crops, regions and time periods. We argue that this anomaly may be traced, at least in part, to the statistical properties of the commonly-used econometric estimator, which has infinite moments of all orders and may have a bimodal distribution. We propose an alternative minim...

Why are case-time estimates so often off?

Why are estimates of global isoprene emissions so similar ( and why is this not so for monoterpenes ) ?

1 Department of Physical Geography and Ecosystems Analysis, Geobiosphere Science Centre, Lund University Sölvegatan 12, 223 62, Lund, Sweden 2 Department of Ecology and Evolutionary Biology, and Cooperative Institute for Environmental Sciences, University of Colorado, Boulder, CO, 9 80309, USA 3 Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwa...

Why are clicks so exclusive ?

Clicks occur abundantly in the languages of southern Africa, but are not found anywhere else. This is unexpected since the clicks seem to be both auditorily salient and easy to produce. This paper suggests that the reason for the areal skewness of clicks lies in the African phonetictypological environment rather than in production or perception constraints. In particular, clicks are limited to ...

Why are agricultural impacts of climate change so uncertain? The importance of temperature relative to precipitation

Estimates of climate change impacts are often characterized by large uncertainties that reflect ignorance of many physical, biological, and socio-economic processes, and which hamper efforts to anticipate and adapt to climate change. A key to reducing these uncertainties is improved understanding of the relative contributions of individual factors. We evaluated uncertainties for projections of ...