When is the level of entry of buyers or sellers effi cient in markets with search and matching frictions? This paper generalizes the well-known Hosios condition for constrained effi ciency to a wide range of dynamic search and matching environments where the expected match output depends on the market tightness. The generalized Hosios condition is simple and intuitive: entry is constrained effi...

wileyonlinelibrary.com placed on the materials involved, it becomes important to understand if those demands could be alleviated by employing different operational principles. Such an opportunity may arise in energy transfer (ET) based hybrid nanostructures [ 2,3 ] that seek a clear separation of the functionalities of the different materials components: one component of the hybrid structure is...

Hideki Miyazaki Tatsuyuki Yamamoto Hitoshi Kobayashi Atsushi Yokoyama OVERVIEW: Hitachi researches and develops control technologies and systems for electric vehicle motors that provide better energy effi ciency and safety. This has included using an EV test vehicle to demonstrate the use of the electric motor in traction control and antilock braking, utilizing the rapid changes in torque made ...

White organic light emitting diodes (white-OLEDs) have shown the potential to replace commercial sources for lighting applications because of their high effi ciency and superior color quality. The most conventional architectures used to maximize the performances of such devices consist in the employment of three kinds of emitting phosphorescent or fl uorescent molecules and modifi ed glass subs...

the main objective of this study was to investigate the effi ciency of biological treatmentof azo dye-containing wastewater with a sequencing batch reactor system, followed by ultrafi ltration.the performance of the system was quantifi ed by measuring the chemical oxygen demand and azo dyeconcentration. the biodegradation was carried out under combined alternating anaerobic and aerobiccondition...

This paper defi nes three types of typical certifi ed farms in Kenyan export production: smallholder farms, large-scale contracted farms, and exporter-owned farms. It assesses their economic performance, compares the fi nancial cost of compliance with the EurepGAP standard, and analyses transaction costs. Results show that larger farms are not generally performing more effi ciently compared to ...