Los Angeles County spent nearly eight months building a paper trail on exactly what federal immigration enforcement cost its economy. $253.9 Billion Is What Los Angeles Actually MeasuredThe motion behind the study came from Supervisors Hilda Solis and Janice Hahn; the analysis itself was carried out by the LA County Economic Development Corporation's Institute for Applied Economics. Its authors concluded the disruption hit citizens and noncitizens alike, dragging down tax collections at every level of government — county, state and federal. Houston's Larger, Less-Documented WorkforceNo Texas county or state agency has built an equivalent model for Houston, even though Harris County's undocumented population is larger in absolute terms than the population LA County's report measured. The gap likely reflects the different time periods measured rather than a factual dispute, but no single, reconciled figure exists.