Publications by authors named "Daniel J Hopkins"

The Affordable Care Act (ACA) was a central issue dividing Republicans and Democrats for the decade following its 2010 enactment. As such, it offers key lessons about policy making and public opinion during a highly polarized political period. The author draws out some of those lessons from his 2023 book Stable Condition: Elites' Limited Influence on Health Care Attitudes, detailing how polarization shaped both the elite- and mass-level politics of the ACA.

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Importance: Every year during the open enrollment period, hundreds of thousands of individuals across the Affordable Care Act marketplaces begin the enrollment process but fail to complete it, thereby resulting in coverage gaps or going uninsured.

Objective: To investigate if low-cost ($0.55 per person) letters can increase health insurance enrollment.

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Purpose: To investigate partisanship in COVID-19 attitudes, and assess partisan or scientific messaging effects on COVID-19 vaccination intentions.

Design: Two-wave survey with two-arm randomized experiment.

Setting: Recruited Pennsylvania residents online.

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Changes in partisan outcomes between consecutive elections must come from changes in the composition of the electorate or changes in the vote choices of consistent voters. How much composition versus conversion drives electoral change has critical implications for the policy mandates of election victories and campaigning and governing strategies. Here, we analyze electoral change between the 2012 and 2016 U.

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The ability to cast a mail ballot can safeguard the franchise. However, because there are often additional procedural protections to ensure that a ballot cast in person counts, voting by mail can also jeopardize people's ability to cast a recorded vote. An experiment carried out during the COVID-19 pandemic illustrates both forces.

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Immigration and demographic change have become highly salient in American politics, partly because of the 2016 campaign of Donald Trump. Previous research indicates that local influxes of immigrants or unfamiliar ethnic groups can generate threatened responses, but has either focused on nonelectoral outcomes or analyzed elections in large geographic units, such as counties. Here, we examine whether demographic changes at low levels of aggregation were associated with vote shifts toward an anti-immigration presidential candidate between 2012 and 2016.

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