The COVID-19 outbreak has brought unprecedented social attention to economic uncertainty and negative interest rate policy (NIRP). How does uncertainty affect economic activity, and how effective is a NIRP based on central bank digital currency (CBDC)? To answer the two questions, we constructed...

Additive manufacturing (AM) was initially designed for prototyping and product personalization, where high production quantities were not required. Now, it is also implemented for final part production to achieve cost-effective mass customization (MC). Thanks to its tool-less production and...

Past research into the determinants of international trade highlighted the importance of the basic spatial gravity model augmented by additional variables representing sources of friction. Studies modeled many sources of friction using various proxies, including indices based on expert judgment...