Results from long-term experimental trials suggest that similar yields and lower costs are possible from organic compared with conventional field crop production, but there is little information about the relative costs and returns on commercial farms. This study examines the structure and profitability of commercial wheat production using a nationwide survey of wheat producers for 2009 that in...

How is the bidirectional motion of organelles controlled? In this issue, Deacon et al. (2003) reveal the unexpected finding that dynactin (previously known to control dynein-based motility) binds to kinesin II and regulates anterograde movement of Xenopus melanosomes. This result suggests that dynactin may be a key player in coordinating vesicle traffic in this system.

The essay is mainly about the application of game theory in markets COVID-19 time. And int explains thoughts people (customers and companies) when new policies came out. gets conclusion that COVID-19’s causes anxious citizens, this kind feelings lead to shortage goods, then governments or firms out make sure there enough goods by limiting number can buy. This research will help explaining reaso...

This article reviews fundamental economic concepts of enforcing environmental policies. It describes the basic economic theory of compliance with environmental regulations and reviews empirical tests of hypotheses that the theory produces. It also presents some conceptual notions about the efficient design of enforcement strategies. The article deals with enforcement of traditional command-and-...