When Pension Reform Does Not Bite: Reform Measurement, Informality, and Labour Market Responses Across Countries

Abstract

This paper examines the macro-labor market impacts of public pension adjustments using a

comprehensive global panel of 183 countries from 2000 through 2024. Its central contribution

is to demonstrate that estimated policy impacts depend fundamentally on how a reform event

is taxonomically defined and on the institutional formalization of the labor market in which it is

executed. Utilizing the interaction-weighted event-study design formalized by Sun and

Abraham (2021) to insulate estimates against staggered treatment biases, the analysis

directly contrasts two alternative reform measures: a broad definition treating any recorded

administrative or legislative update as a uniform treatment onset, and a restricted definition

that isolates exclusively major structural and parametric shocks that directly alter individual

budget constraints. The interactive fixed-effects specifications provide three evidence. First,

while both definitions detect a downward trajectory in labor force participation (LFP) within

non-African economies, the restricted taxonomy removes institutional noise to yield larger,

more economically substantive, and more precisely estimated point estimates, capturing an

absolute 4.09 percentage point contraction within four years of enactment compared to an

attenuated 3.81 percentage points under the broad classification. Second, across African

economies, the estimated treatment effects under both definitions are small, short-lived, and

statistically indistinguishable from zero, confirming that low statutory coverage and pervasive

labor market informality act as a structural brake that completely decouples behavioral

responses from formal policy adjustments. Third, the macro-labor response is highly unequal

across alternative outcomes and gender lines. Within non-African settings, declining

participation is mirrored by a sharp expansion in the national unemployment rate, verifying a

severe demand-side worker displacement friction, while female labor supply drives the overall

downward contraction across all operational specifications. Finally, forward-looking

counterfactual micro-simulations and never-treated regional projections illustrate the broad

economic scale of these parameters, establishing that the measurement of a reform is not a

neutral technical choice but a substantive one that alters empirical conclusions. Our results

prove that explicitly accounting for taxonomical boundaries and underlying labor market

segmentation is a prerequisite for the rigorous econometric evaluation of social protection

systems.