At the start of the Coronavirus Disease (COVID-19) vaccination campaign in Mexico, the vaccine was the world's most essential and scarce asset. Managing its administration to optimize its use was, and still is, of paramount importance. However, when the first vaccine was developed at the end of...

Business Angels (BAs) are pivotal in early-stage funding for entrepreneurship. This study explores the factors influencing BA investment decisions. We propose a theoretical model based on signaling theory to assess the impact of signals about the quality of entrepreneurs and projects on...