It’s not a big shock that those who get a PhD tend to have parents who also had a higher level of education. If your parent have some knowledge about how to navigate the tangled forests of academia, along with the financial resources to help you along, you are more likely to get that advanced degree. But what is surprising, at least to me, is that this connection between parental education and getting a PhD is stronger for economics than for mostother fields.

Robert Schultz and Anna Stansbury provide the facts in “Socioeconomic Diversity
of Economics PhDs
” (March 2022, Peterson Institute for International Economics, WP-22-4). This figure shows some of the background. The first panel shows, in each field, what share of those with PhDs have parents who did not complete a college degree. Economics is the lowest. The second panel shows what share of those with PhDs in a given field have parents who completed a college degree, but not an additional degree. Economics is near the top. The third panel shows what share of those with PhDs in a given field have parents who completed a graduate degree in some field (not necessarily the same one).

One possible concern here is that many PhD programs at American universities have a large share of international students. Perhaps the patterns would be different if we focused only on US-born PhDs? Not really. Here are the same figures, this time with only US-born PhDs. As you can see, US-born economics PhDs are least likely to have parents without a BA degree and most likely to have parents with an advanced degree. It’s true that economics PhD’s don’t look different in the middle graph of those with only a BA degree, but it’s also true taht the differences in that middle graph across different PhD fields are relatively small.

This distinctive pattern of economics PhDs seems to have emerged in the 1980s and 1990s, and remained that way since then. This graph shows that the connection between whether a parent has an advanced degree and an individual’s likelihood of getting a PhD. The overall pattern here is interesting: across many fields, those who get PhDs are more likely to have parents with advanced degrees. For many other fields, this pattern has flattened out in the last couple of decades: in economics, not so much. There is a broader social issue here, which is that higher education has become a way for the well-off to give their children a socioeconomic boost as well–an intergenerational social mechanism that is probably much more important for most families than the size of any purely financial inheritance. But my focus here is on the pattern for economics PhDs, where this overall pattern is strongest.

Why does economics stand out from other subject areas in these comparisons? The answer isn’t obvious. One possibility is that the gap between a BA degree and PhD study is large in most fields, but maybe largest in economics. In most economics programs, it’s possible to get high grades in all your required classes and your senior project, but if you have not taken an additional heavy dose of math and statistics beyond those requirements, or if your undergraduate department hasn’t prepared you for graduate school expectations in other ways, you are less likely to be admitted and to succeed in an economics PhD program. Perhaps parents with graduate degrees are more aware of these issues, and so their children who go on to enter an economics PhD program are better prepared.

Another theory is that there is something in the way economics is commonly presented or taught at the undergraduate level which makes it less appealing to students whose parents do not have graduate degrees.

A related insight from Schultz and Stansbury is to look at the share of economics PhDs who graduated from what they call the “Ivy Plus” category–that is, the eight Ivy League schools plus Stanford, MIT, the University of Chicago, and Duke. The focus here is on US-born PhD recipients from all fields. The top panel shows that among US-born PhDs in all field, those in economics are least likely to have received their undergraduate BA from a public institution; the bottom panel shows that among US-born PhDs in all field, those in economics are much more likely to have received their undergraduate BA from one of the “Ivy Plus” institutions. (Moreover, if one included some of the more selective public universities like University of California-Berkeley and Michigan in the “Ivy Plus” category, these gaps would appear wider.)

I won’t try to draw big-picture conclusions here about “what it all means about economics.” But the picture that emerges is that PhD programs in economics seem notably less open to the range of parental backgrounds than other fields. Moreover, that lack of openness is being enforced and replicated by admissions committees in economics PhD programs.