“...•We study how children's healthcare utilization responds to small copayments (ca USD 10–20).•We exploit changes in utilization around age thresholds.•As a...”

“...[...]after the outbreak of the Spanish Civil War, Hemingway accepted an offer by the North American Newspaper Alliance (NANA) to go to Spain and cover the...”

“...Unemployment swings have distributional consequences if some groups are hit harder than others. We examine if the sensitivity to local unemployment rates...”

“...Abstract Background Selection and selection bias are terms that lack consistent definitions and have varying meaning and usage across disciplines. There is...”

“...We use the Swedish compulsory school reform to estimate the causal effect of parental education on sons 1 outcomes. To this end, we use data from the Swedish...”

“...In any study with voluntary participation, self-selection risks leading to invalid conclusions. If the determinants of selection are observed, it is however...”

“...To investigate whether inverse probability of participation weighting (IPPW) using register data on sociodemographic and disease history variables can improve...”

“...•We examine the long-term impact of exposure to the vaccine against polio during childhood (ages 0–10) on adult outcomes.•Using large registry data for Sweden,...”