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Creators/Authors contains: "Ma, Yueran"

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  1. ; ; ; ; (, NBER Macroeconomics Annual)
    Free, publicly-accessible full text available July 1, 2026
  2. ; ; (, American Economic Review)
    We collect data on the size distribution of US businesses for 100 years, and use these data to estimate the concentration of production (e.g., asset share or sales share of top businesses). The data show that concentration has increased persistently over the past century. Rising concentration was stronger in manufacturing and mining before the 1970s, and stronger in services, retail, and wholesale after the 1970s. The results are robust to different measurement methods and consistent across different historical sources. Our findings suggest that large firms have become more important in the US economy for a long period of time. (JEL D22, E24, L11, L25, N12) 
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  3. ; (, The Quarterly Journal of Economics)
    Abstract We develop a new data set to study asset specificity among nonfinancial firms. Our data cover the liquidation values of each category of assets on firms’ balance sheets and provides information across major industries. First, we find that nonfinancial firms have high asset specificity. For example, the liquidation value of fixed assets is 35% of the net book value in the average industry. Second, we analyze the determinants of asset specificity and document that assets’ physical attributes (e.g., mobility, durability, and customization) play a crucial role. Third, we investigate several implications. Consistent with theories of investment irreversibility, high asset specificity is associated with less disinvestment and stronger effects of uncertainty on investment activities. We also find that the increasing prevalence of intangible assets has not significantly reduced firms’ liquidation values. 
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