A meta-analytic review of 87 acculturation studies (Journal of Social Psychology, 2024) found that immigrants who maintained high heritage-culture identification experienced stronger within-group social support and better psychological well-being overall, but also elevated rates of workplace discrimination and social exclusion in some host contexts. Approximately 21% of heritage-assertive immigrants across the reviewed studies reported negative economic outcomes attributable to visible cultural distinctiveness — the action-side proxy used here. Berry’s acculturation framework, validated in a separate PMC meta-analysis of the four-strategy model, establishes that integration (maintaining both identities) consistently outperforms assimilation in long-term well-being, but the costs of heritage assertion vary substantially by host-country context.
On the inaction side, an ICMC (International Catholic Migration Commission) report on migrant assimilation outcomes in European receiving countries found that approximately 38% of first-generation immigrants who strongly assimilated reported that assimilation led to the loss of heritage cultural practices and identity markers they later wished they had preserved — a direct identity-regret measure rather than a well-being proxy. The Berry meta-analysis corroborates the direction of this finding: assimilation strategies are consistently associated with elevated identity distress in long-term follow-up, while integration — the strategy that requires asserting heritage identity alongside host-culture adoption — produces better outcomes.
The 17-point gap is directionally consistent with the Gilovich-Medvec inaction-dominates pattern: the costs of assimilation are long-duration and quietly accumulating (lost language fluency, lost ritual knowledge, weakened family ties), while the social and economic costs of heritage assertion are more immediate and visible. The principal caveat is that the optimal strategy is highly context-dependent: heritage assertion in a multicultural policy environment like Canada or Australia carries different costs than the same assertion in a monocultural assimilationist context. The action-side 21% and inaction-side 38% are constructed from different studies with different populations and outcome measures, and neither is a direct bilateral regret comparison.