Benjamin Ranish

Federal Reserve Board of Governors
Washington, DC 20006

E-Mail: EmailAddress: hidden: you can email any NBER-related person as first underscore last at nber dot org
Institutional Affiliation: Harvard University

NBER Working Papers and Publications

August 2018Do the Rich Get Richer in the Stock Market? Evidence from India
with John Y. Campbell, Tarun Ramadorai: w24898
We use data on Indian stock portfolios to show that return heterogeneity is the primary contributor to increasing inequality of wealth held in risky assets by Indian individual investors. Return heterogeneity increases equity wealth inequality through two main channels, both of which are related to the prevalence of undiversified accounts that own relatively few stocks. First, some undiversified portfolios randomly do well, while others randomly do poorly. Second, larger accounts diversify more effectively and thereby earn higher average log returns even though their average simple returns are no higher than those of smaller accounts.

Published: John Y. Campbell & Tarun Ramadorai & Benjamin Ranish, 2019. "Do the Rich Get Richer in the Stock Market? Evidence from India," American Economic Review: Insights, vol 1(2), pages 225-240. citation courtesy of

March 2014Getting Better or Feeling Better? How Equity Investors Respond to Investment Experience
with John Y. Campbell, Tarun Ramadorai: w20000
Using a large representative sample of Indian retail equity investors, many of them new to the stock market, we show that both years of investment experience and feedback from investment returns have significant effects on investor behavior, favored stock styles, and performance. We identify two channels of feedback: performance relative to the market, and the directly experienced returns to behavior and styles of stock. Both of these vary across investors at a point in time because investors are imperfectly diversified and receive idiosyncratic returns. We find that experienced investors generally behave in a manner more consistent with the recommendations of finance theory, although this tendency is weakened by strong investment performance. High trading profits increase turnover, whil...
September 2012How Do Regulators Influence Mortgage Risk: Evidence from an Emerging Market
with John Y. Campbell, Tarun Ramadorai: w18394
To understand the effects of regulation on mortgage risk, it is instructive to track the history of regulatory changes in a country rather than to rely entirely on cross- country evidence that can be contaminated by unobserved heterogeneity. However, in developed countries with fairly stable systems of financial regulation, it is difficult to track these effects. We employ loan-level data on over a million loans disbursed in India over the 1995 to 2010 period to understand how fast-changing regulation impacted mortgage lending and risk. We use cross-sectional differences in the time- series variation of delinquency rates, conditional on initial interest rates, to detect the effects of regulation on mortgage delinquencies.
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