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What Happens When You Measure Crime Where People Actually Live?

What happens when you swap county averages for neighborhood data? A 22-fold range in crime rates emerges. County-level data suggests crime has no effect on employment. Neighborhood-level data suggests it does.

December 2025 · Methodology

Key Finding from This Research

  • 22-fold variation in crime rates within Santa Clara County, from 23 to 498 per 100,000
  • County-level analysis shows null effects; PUMA-level analysis reveals significant relationships
  • Spatial crosswalk methodology maps 462 police agencies to 275 PUMAs using TIGER/Line spatial joins

Based on analysis of 817,000 California adults using CA DOJ crime data and ACS 5-year PUMS, 2018-2022.

The Unfunded Mandate: How Federal Promises Shape School Budgets

When Congress passed IDEA, they promised to fund 40% of special education costs. They've never come close. The actual number hovers around 15%.

Dec 2025

Better Access, Higher Vulnerability: What 9,033 California Tracts Reveal

Most vulnerable communities have the best geographic food access. Analysis of 9,033 California tracts reveals the vulnerability paradox.

Dec 2025

The Special Education Spending Puzzle

Some California school districts have substantially more money than others. Yet they all spend roughly similar shares on special education.

Dec 2025

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