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It boosts dopamine, which is a brain chemical that plays a part in movement and motivation

Following principal component (PC) analysis, cell clusters were determined via Seurats default graph-based clustering strategy using the FindNeighbors and FindClusters functions

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Illiteracy had a similar effect on income, with a negative coefficient two and a half times greater than that of Black. Curiously, nativity is also a stronger predictor of income, with native-born Puerto Ricans earning much less than non-natives.Footnote 34 Finally, married and older persons tend to earn more, but the effect of age tends to decrease over time