Background Medical specialists are integral to the medical workforce and play a pivotal role in referral systems. However, in ...

Introduction We aimed to determine the association between paternal labour migration and the growth of the left-behind ...

While balsamic vinegar and balsamic glaze share a core ingredient, they are actually fundamentally different condiments with ...

Abstract: The azimuth multichannel synthetic aperture radar (SAR), as one of the mainstream technologies for achieving high-resolution and wide-swath (HRWS) imaging, has been successfully employed in ...

Abstract: It is difficult to design unimodular sequences with both good auto-ambiguity functions (AF) and cross-ambiguity functions (CAF), due to its nonconvex and higher cardinality property. To ...

Coughing and wheezing can leave anyone wondering whether it is asthma or bronchitis at play. Both of these respiratory issues share symptoms but have different roots: one is a chronic condition, ...

This paper surveys econometric innovations related to differences-in-differences estimators and to event-study models with time-varying treatment effects. Our discussion highlights tricky ...