Proposition 12 Two Years In: Retail Prices, Wholesale Segmentation, and the Amplification Gap

Wuit Yi Lwin, Andrew Keller, Shawn Arita, Joseph Cooper, and Sandro Steinbach

Proposition 12 sets animal confinement legislation (ACL) that pork must meet to be sold in California. Because the rule applies at the point of sale, its effects run through the entire supply chain, from the farm and packing plant to the retail shelf. Two years after full enforcement, the policy has produced a persistent retail price premium in California, and most of that premium emerges between the packing plant and the retail shelf.

Retail Pork Market Outcomes

California retail pork prices rose sharply after Proposition 12 took effect and have stayed elevated. Figure 1 shows the weekly retail price gap between California and the rest of the United States (excluding California and Massachusetts) using Circana scanner data. The mean gap rose from 13.3 cents per pound before enforcement to 75.3 cents per pound after. A short-run adjustment story would predict the gap to narrow. Instead, it has held steady for two years. The price increase is uneven across cuts. California premiums rose by 14 to 32 percentage points (pp), with loins (+31.8 pp) and ribs (+21.9 pp) showing the largest increases, followed by shoulders (+16.3 pp), bacon (+16.2 pp), and ham (+13.8 pp, though ham remains discounted in California overall). Sausage, an exempt benchmark, showed no change in its price premium. Higher prices were matched by lower relative purchases. California’s share of total U.S. pork volume fell from 8.5% to 7.1%. The steepest declines were in ribs (−3.0 pp), ham (−2.3 pp), shoulders (−2.1 pp), and loins (−1.9 pp), while the share of exempt sausage held broadly stable. These patterns point to a clear shift in California consumption away from covered products.

Figure 1: California Retail Pork Price Gap Relative to the Rest of the United States.

Note: Weekly retail pork price gap, measured as California minus the rest of the United States, excluding California and Massachusetts, January 2020 through January 2026. Positive values indicate higher retail pork prices in California. The shaded area denotes the transition period (July–December 2023). The vertical line denotes full enforcement (January 2024). Dashed lines show pre-enforcement mean (January 2022–June 2023) and post-enforcement mean (January 2024–January 2026).

Pork Wholesale Market Outcomes

The wholesale market shows a different pattern. Figure 2 reports the share of ACL-compliant pork in total wholesale volume from Livestock Mandatory Reporting (LMR) data. After full enforcement, ACL- compliant pork averaged 5.3% of reported volume, with a peak share of 7.2%. The volume-weighted ACL price premium relative to conventional pork averaged 27.4 cents per pound before full enforcement and

51.6 cents per pound afterward, implying a compliance-attributable wholesale premium of 24.2 cents per pound. The market is segmented rather than transitioning toward full compliance. A small compliant segment commands a persistent premium, while a much larger conventional pork channel continues to handle most volume.

Figure 2: Share of ACL-Compliant Pork in Reported Wholesale Volume.

Note: Monthly share of ACL-compliant pork in total reported wholesale pork volume, January 2022 through January 2026. ACL-labeled pork serves as the wholesale indicator of Proposition 12 compliance. The shaded area denotes the transition period (July–December 2023). The vertical line denotes full enforcement (January 2024). The blue dashed line indicates the pre-enforcement mean (January 2022–June 2023), and the orange dashed line indicates the post-enforcement mean (January 2024–January 2026).

Wholesale-to-Retail Amplification and Economic Burden

The retail price gap widened by 71.2 cents per pound across California and Massachusetts combined, while the wholesale compliance premium widened by 24.2 cents per pound. Applying these premiums to observed retail volumes (565.7 million pounds) and wholesale ACL volumes (764.7 million pounds) from January 2024 through January 2026 yields an estimated economic burden of $403.1 million at retail and

$184.7 million at wholesale. These figures measure additional consumer expenditure at observed post- policy consumption levels, not a full welfare measure. Within the wholesale total, producers received $121.6 million in compliance premiums, and packers retained $63.1 million in net margin. The $218.4 million gap between retail and wholesale burdens reflects retail amplification: the retail price effect in compliant markets is nearly three times the size of the wholesale compliance premium.