Every firm in a developed economy relies on the mere existence of countless other firms to keep prices competitive up and down all supply chains. Without this network externality, no firm forms; and without many firms, no network forms; locking in a low-income trap. Business group governance...

Within countries, state-run banks' lending correlates with prior money growth; otherwise similar private-sector banks' lending does not. Aggregate credit and investment growth correlate with prior money growth more where banking systems are more state-run. Size and liquidity differences between...

Disequilibrating macro shocks affect different firms' prospects differently, increasing idiosyncratic variation in forward-looking stock returns before affecting economic growth. Consistent with most such shocks from 1947 to 2020 enhancing productivity, increased idiosyncratic stock return...

We examine information spillover as a source of stock return synchronicity, where information about highly-followed "prominent" stocks is used to price other "neglected" stocks sharing a common fundamental component. We find that stocks followed by few analysts co-move significantly with...

Because positive spillovers give investment in innovation a social rate of return several times higher than its internal rate of return to innovators, innovation is chronically underfunded. Recurrent manias, panics and crashes in stock markets inundate "hot" new technologies with capital. To the...

In lower-income economies, stocks exhibit less idiosyncratic volatility and business groups are more prevalent. This study connects these two findings by showing that business group affiliated firms' stock returns exhibit less idiosyncratic volatility than do the returns of otherwise similar...

Business groups often contain banks or near banks that can protect group firms from economic shocks. A group bank subordinate to other group firms can become an "organ bank" that selflessly bails out distressed group firms and anticipates a government bailout. A group bank subordinating other...

Savings increasingly flow to low-cost index funds, which simply buy and hold the stocks in a major index, such as the S&P 500. Increased indexing impedes incorporation of idiosyncratic information into stock prices. We limit endogeneity bias by showing that exogenous idiosyncratic currency...

Because corporate limited liability protects founder's personal assets, creditors often require founders of new, small and risky firms to contract around limited liability by pledging their personal assets as collateral for loans to their firms. This makes personal bankruptcy law (PBL) relevant...

Countries in which billionaire heirs' wealth is large relative to G.D.P. grow more slowly, show signs of more political rent-seeking, and spend less on innovation than do other countries at similar levels of development. In contrast, countries in which self-made entrepreneur billionaire wealth...