2026-10-11T21:29:04Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33816637 2026-09-15T18:18:43Z category_24 category_39 category_734 category_106 portal_5 item_type_3 month_year_09_2026

<p>Parameter regimes for 0 < <i>p</i> < 1/2.</p> Masanori Takano (5518439) Evolutionary Biology Ecology Biological Sciences not elsewhere classified Science Policy sustain underrepresentation even capita effective rate actor explicitly excludes cumulative structural disadvantage type &# 8217 finite corrective strength corrective strength required avoiding complete exclusion current representation changes attaining proportional representation dependent structural feedback corrective action responds simple population model structural feedback corrective action population model focal type destabilize exclusion corrective policies population share weak relative threshold dynamics run stability run share explicit conditions exclusionary state also suggest <div><p>Structural discrimination can sustain underrepresentation even when no actor explicitly excludes a group. We develop a simple population model in which current representation changes each type’s per-capita effective rate of maintaining or expanding its presence, while corrective action responds to the gap from a reference-population share. The model yields three main results. First, an exclusionary state can remain stable when corrective action is present but weak relative to representation-dependent structural feedback. Second, the corrective strength required to destabilize exclusion is greater for a focal type that is rarer in the reference population. Third, avoiding complete exclusion is not the same as attaining proportional representation: with finite corrective strength, the stable long-run share can remain below the reference share. These results connect qualitative accounts of cumulative structural disadvantage to explicit conditions for long-run stability. They also suggest that corrective policies should be evaluated by their effective dynamic strength relative to the structural feedback they are intended to change, rather than by their formal presence alone.</p></div> 2026-09-15T18:18:35Z Dataset Dataset 10.1371/journal.pcsy.0000132.t001 https://figshare.com/articles/dataset/_p_Parameter_regimes_for_0_i_p_i_1_2_p_/33816637 CC BY 4.0