The main tenet of the New Keynesian (NK) paradigm is that price dispersion caused by nominal price stickiness is the primary source of allocative inefficiency. This study empirically evaluates the welfare implications of NK models by observing how internal and external price dispersion responds...

When identifying trade costs, the assumption of iceberg-type costs causes biases when specific (per-unit) costs exist. Although some studies measure the magnitude of specific costs, they suffer from self-selection bias. Furthermore, studies that account for selection and quality heterogeneity do...