47% of respondents told us they would prefer to pay for online purchases in cash if it were easy, and 44% would buy online more often if they could pay in cash. Overall, 13% are using eCash more often than they were 12 months ago (three ...
To unveil whether the potential changes in performance are due to changes in productivity or reduced efforts of volunteering, we estimate the effect of censorship on the amount of time used per week. Ideally, we would like to use the same difference-in-differences design with each participant’...
Depending on the site’s status and the possibility of reaching them, filter exposure continued for two weeks to one month. Table 1. Reagent, analyte and analytical method. After exposure, the sampler was placed into a plastic container that was then closed tightly with a lid and transported...