Tax Policies Mirror Voters, Spending Priorities Stay Unchanged

Spatial theories of voting and policy implementation face a key challenge: accurately measuring voters' preferences, politicians' ideologies, policies, and the status quo on one scale. This paper introduces a novel technique to estimate these elements collectively.

Through this new measurement approach applied to state-level data, we reveal significant differences in how various policies respond to voter positions over time.

Policy Responsiveness

• Tax Policies: Our findings show tax policy outcomes strongly and immediately mirror shifts in the median voter's position. This aligns with expectations under the Median Voter Theorem.
• Spending Policies: Conversely, spending policies react much less responsively to the changing median voter position, showing only a slight correlation over time.

Mechanism Analysis

We investigated why these divergent responses occur:

• Short-term: Elected officials' positions do indeed shift significantly in response to the evolving views of their median voter constituency. However, this positional change has minimal direct impact on spending policy outcomes.
• Long-term: Instead, our analysis indicates that sustained changes in overall government ideology (driven by shifts in who holds office over time) gradually influence both tax and spending policies.