How has mainstream academic economic discourse evolved to regain its epistemic authority after the financial crisis of 2008 revealed serious blind spots in economic modelling that shattered the profession’s claim to be able to predict and control macroeconomic variables? To answer this question, we combine content with bibliometric analyses of nearly 70,000 papers on macroeconomics and finance published in academic journals from 1990 to 2019. These analyses reveal how a structural rapprochement between macroeconomics and finance created the new subfield of macro-finance. We show that contributions by central bank economists, driven by central banks’ newly acquired macroprudential mandate, were key to its establishment. Acting within the space of regulatory science, they connected macroeconomic and financial knowledge to satisfy their employers’ administrative needs, while also helping to bridge the gaping hole in economic discourse, thereby taking on an important stabilizing role for the epistemic authority of economics.

Survey evidence tells us that stock prices reflect the risks investors associate with long-run technological change. However, there is a shortage of models that can rationalize long-run risks. Unlike the previous literature assuming a fixed number of products, our model allows for new product varieties that appear in the form of new firms which face entry costs and delay in the entry process. The fixed variety model has a significant limitation in translating macroeconomic volatility into asset return volatility. Our model with growing varieties induces endogenous low-frequency fluctuations in productivity driving large, persistent variations in consumption growth and asset prices. It also changes the valuation of assets through the increase in the volatility of the pricing kernel (with a positive long-run component) and leads to higher excess returns. Our model is motivated by a simple recursively identified VAR model containing quarterly US data 1992Q3-2018Q4 with the following list of variables: total factor productivity, output, a measure of firm entry, and the excess return on stocks.