Using a large panel dataset that covers 116 countries and 5013 products over the period 1998–2010, this study evaluates the effects of export experience on the geographic expansion of China's exports. The results suggest that past export experience in geographically close and culturally...

Social networking applications such as Facebook, Twitter, and Crowdrise offer new ways for nonprofits to engage the community in fundraising efforts. This study employs data from Facebook Causes to examine the nature and determinants of charitable giving in social networking environments. Our...

International research collaboration plays an important role in the social construction and evolution of science. Studies of science increasingly analyze international collaboration across multiple organizations for its impetus in improving research quality, advancing efficiency of the...

This paper investigates the aggregate and distributional effects of urbanization and migration in China using a spatial equilibrium model and population sample survey data from 2005 and 2015. Our quantitative results show a high (low) elasticity of substitution between rural migrants and...

Reducing the synthesis costs of electrode materials and improving their electrochemical performance remain key issues regarding the application of sodium-ion batteries (SIBs) in large-scale energy storage devices. Antimony sulfide (Sb2S3) is a promising anode material for SIBs because of its...

A series of β-NaYF 4 :20mol%Yb 3+ , 2mol%Er 3+ microcrystals with different concentrations of Ca 2+ ions doping had been fabricated via a hydrothermal method assisted by sodium citrate at various pH values. We obtained not only the β-NaYF 4 :20mol%Yb 3+ , 2mol%Er 3+ microcrystals with...