Reconciling Trends in U.S. Male Earnings Volatility: Results from Survey and Administrative Data
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Analysis of multiple data series finds that U.S. male earnings volatility has remained largely stable since the mid-1980s. Despite some short-term fluctuations, long-term volatility trends show minimal change.
"...There is a large literature on earnings and income volatility in labor economics, household finance, and macroeconomics. One strand of that literature has studied whether individual earnings volatility has risen or fallen in the U.S. over the last several decades. There are strong disagreements in the empirical literature on this important question, with some studies showing upward trends, some showing downward trends, and some showing no trends. Some studies have suggested that the differences are the result of using flawed survey data instead of more accurate administrative data. This paper summarizes the results of a project attempting to reconcile these findings with four different data sets and six different data series--three survey and three administrative data series, including two which match survey respondent data to their administrative data. Using common specifications, measures of volatility, and other treatments of the data, four of the six data series show a lack of any significant long-term trend in male earnings volatility over the last 20-to-30+ years when differences across the data sets are properly accounted for. A fifth data series (the PSID) shows a positive net trend but small in magnitude. A sixth, administrative, data set, available only since 1998, shows no net trend 1998-2011 and only a small decline thereafter. Many of the remaining differences across data series can be explained by differences in their cross-sectional distribution of earnings, particularly differences in the size of the lower tail. We conclude that the data sets we have analyzed, which include many of the most important available, show little evidence of any significant trend in male earnings volatility since the mid-1980s...."
The evidence:"...The six data series used in this project are shown in Table 1: the PSID, the CPS survey, CPS linked Social Security earnings records, the SIPP survey, SIPP-linked Social Security earnings records, and UI earnings from the LEHD. The PSID has been analyzed many times before, so the primary purpose of including it is only to provide a baseline estimate using the same sample definitions, measures of volatility, and other analysis features as those in the other five data series. For all data sets, only men 25-59 in each year are included..."...All analyses use simple and transparent summary measures of gross earnings volatility, calculating the earnings change from one year to a subsequent year, either one or two years later, depending on the data set..."
“…Figure 1 shows our baseline results, using the samples and earnings variables listed in Table 1, for men working both periods. The PSID shows patterns mostly consistent with prior work, with rising volatility from the 1970s to the mid-1980s, then following a stable trend around significant fluctuations through about 2002, then rising in the period leading up to and including the Great Recession, and then falling post-Recession from 2012 to 2016.The last four years of PSID data are new to this project and show that volatility has declined back to its pre-Recession level in 2006, which was somewhat above its level in the mid-1980s. The series for the other five data sets are often different from the PSID in level but not always in trend. The SIPP administrative data series, which starts in 1980, is higher in level than the PSID but follows a similar slight decline from 1982 through about 1999, but with fluctuations over that period much milder in magnitude than for the PSID (perhaps the result of a larger sample size—see Table 1). It then also rises before the Great Recession and falls afterwards, although again not always of the same magnitude and at exactly the same time points as the PSID. The SIPP survey data have a lower level of volatility than the PSID (and much lower than the SIPP administrative data series) but has an approximately similar pattern in the first half of the period—a rise then fall from 1985 to 1999, but occasionally moving in opposite directions (e.g., 1988-1990).16 But the main difference with the SIPP survey is that it rises much less before and during the Great Recession than the PSID and the SIPP administrative data series…”

Robert Moffitt, John Abowd, Christopher Bollinger, Michael Carr, Charles Hokayem, Kevin McKinney, Emily Wiemers, Sisi Zhang and James Ziliak, "Reconciling Trends in U.S. Male Earnings Volatility: Results from Survey and Administrative Data," National Bureau Of Economic Research, https://www.nber.org/papers/w29737
Key quote, “…We conclude that average volatility growth rates in the 2000s and partway into the 2010s were quite similar for most of the data sets, with some exceptions. Combined with our finding of very little volatility trend in the three data sets covering the period from the mid-1980s to the 1998- 2002 period, we also conclude that there is little evidence for significant trends upward or downward over the last 20-30 years….”























