Post-936 Puerto Rico Mobility Gains Weaker, Study Shows

A landmark study on intergenerational social mobility in Puerto Rico has delivered the first representative data on a topic long clouded by anecdote and aggregate poverty statistics. The findings, published by University of Puerto Rico economists José Caraballo-Cueto and Eileen Segarra-Alméstica, provide a clear signal: upward mobility remains positive across the island. The gains, however, weakened for those who came of age after the expiration of Section 936, the federal tax incentive that once anchored a manufacturing boom.

For investors tracking Puerto Rico’s economic trajectory, the study sharpens the debate around the island’s growth model, the durability of its workforce, and the policy levers that could alter the long-term return profile of Puerto Rico credits and operating assets.

The Catalyst: First Representative Mobility Data

The study surveyed 1,000 adults aged 30 to 60 across Puerto Rico, comparing their current socioeconomic standing with conditions at age 14. A composite socioeconomic index rose from 0.60 at age 14 to 0.76 in adulthood, confirming that most respondents experienced improved living standards. The index captured housing quality, vehicle ownership, neighborhood characteristics, occupation, education, and self-perceived social class.

That headline number masks a critical divergence. Researchers split the sample into two cohorts: those who were 14 or older before the 1996 phase-out of Section 936, and those who were younger. The post-936 generation still showed positive mobility. The magnitude, however, was lower. The study does not quantify the gap in index points. The direction is unambiguous: the end of the tax program that attracted pharmaceutical and electronics manufacturing left a measurable imprint on the speed at which families climbed the economic ladder.

Why Section 936 Matters Now

Section 936 allowed U.S. corporations to claim a tax credit on income earned in Puerto Rico, effectively exempting profits from federal tax. Its repeal, phased out over a decade starting in 1996, triggered a prolonged contraction in manufacturing employment. The study’s finding that mobility softened for the post-936 cohort gives empirical weight to what had been a widely assumed, previously unmeasured drag. For bondholders and direct investors, this matters because it suggests that the island’s growth potential is not only a function of current fiscal policy. It also reflects a structural break that continues to shape the labor force.

The Affected Asset: Puerto Rico's Credit and Workforce

The study does not name a stock or bond. The most direct read-through is to Puerto Rico municipal bonds and the broader assessment of the island’s economic capacity. A labor force with weaker upward mobility implies slower improvement in income levels, lower household formation, and a narrower tax base over time. All of these feed into the credit metrics that rating agencies and insurers track.

The report also identified the University of Puerto Rico as “an important engine of relative social mobility.” About 23% of respondents attended UPR, and those who did showed stronger relative mobility indicators, particularly in occupational education and income measures. This creates a direct link between public investment in higher education and the island’s economic trajectory. Any policy that weakens UPR’s capacity, whether through budget cuts or enrollment constraints, would directly threaten one of the few statistically validated mobility engines.

Education as the Dominant Variable

After controlling for personal and family characteristics, the study found that higher levels of university education were the main determinant of social mobility in both age cohorts. The survey documented a sharp rise in educational attainment: 16.2% of respondents held a bachelor’s degree or higher, compared with just 6.4% of their parents or guardians. That jump is substantial. The post-936 cohort’s weaker mobility, however, suggests that education alone was not enough to fully offset the loss of high-productivity manufacturing jobs.

Policy Sensitivity and Investment Exposure

The study lands at a moment when Puerto Rico’s fiscal oversight board is weighing long-term structural reforms and the central government is debating incentives to attract new industries. The findings give ammunition to arguments that tax policy and industrial incentives have generational consequences. A renewed push for federal tax benefits, or a local incentive program that successfully lures advanced manufacturing or technology firms, could directly address the mobility gap the study identifies.

Conversely, if the policy response is limited to fiscal consolidation without growth-oriented measures, the post-936 mobility drag could persist. For holders of Puerto Rico general obligation bonds or COFINA bonds, the study is a reminder that debt service capacity ultimately rests on the income trajectory of the population. A slow-motion erosion of mobility is a slow-motion erosion of the tax base.

Factors That Could Confirm or Weaken the Thesis

Confirmation signal: A follow-up study or labor-market data showing that mobility has improved for the youngest cohort (those entering the workforce after the 2017 bankruptcy and hurricane restructuring) would suggest that recent reforms are gaining traction.

Weakening signal: Continued out-migration of university graduates, or a decline in UPR enrollment, would undermine the primary mobility channel the study identifies.

Policy catalyst: Any federal legislation that restores a version of Section 936 or creates a new territorial tax incentive would be a direct positive shock to the mobility outlook.

Other Mobility Factors the Study Surfaces

The report flagged several additional variables that shape mobility, each with its own investment read-through:

Female household providers: When a woman was the main provider at age 14, respondents showed stronger mobility. This suggests that labor force participation among women is a multiplier, not just a social indicator. Policies that support female workforce entry, such as childcare subsidies or flexible work regulation, could amplify mobility gains.

Public vs. private school: For older respondents, attending public school was associated with greater mobility than private school. Researchers attribute this to a ceiling effect: private school students already started from a higher socioeconomic base. For younger cohorts, the relationship may have shifted as the public school system faced budget pressures. Investors in Puerto Rico’s education sector or in businesses reliant on local talent should track school quality metrics closely.

Housing and vehicle ownership: The composite index includes these tangible assets, which means that mobility is partly a story of physical capital accumulation. Programs that expand access to mortgage credit or reliable transportation could accelerate the mobility gains that education alone cannot deliver.

Practical Framework for Tracking Puerto Rico Exposure

For traders and analysts with exposure to Puerto Rico through municipal bonds, insurers with island liabilities, or companies operating in the territory, the study provides a new lens. Instead of relying solely on aggregate GDP or employment data, the mobility index offers a bottom-up view of whether living standards are improving across generations. A widening gap between educational attainment and mobility outcomes would be an early warning that the economy is underperforming its human capital potential.

The study’s authors are clear about the stakes: “Social mobility is fundamental to avoid families perpetuating poverty across generations.” For investors, that same mechanism determines whether Puerto Rico’s consumer base and tax base can grow fast enough to service legacy obligations and attract new capital. The post-936 generation’s experience is not just a historical footnote; it is a live variable in every long-duration Puerto Rico credit.