As an example I found on a moment's googling, I'll just quote you part of the conclusion from this article: (https://eh.net/encyclopedia/the-economic-impact-of-the-black...)

The European economy at the close of the Middle Ages (c. 1500) differed fundamentally from the pre—plague economy. In the countryside, a freer peasant derived greater material benefit from his toil. Fixed rents if not outright ownership of land had largely displaced customary dues and services and, despite low grain prices, the peasant more readily fed himself and his family from his own land and produced a surplus for the market. Yields improved as reduced population permitted a greater focus on fertile lands and more frequent fallowing, a beneficial phenomenon for the peasant.