Open Economic & Quant Research Observatory Updateshttps://yangxiaoshawn.github.io/2026-08-17T00:00:00Z CasualLabhttps://yangxiaoshawn.github.io/projects/casuallab/2026-08-17T00:00:00ZExperimental causal inference and policy simulation toolkit with NYC-oriented public examples. Macroeconomicshttps://yangxiaoshawn.github.io/projects/macroeconomics/2026-08-17T00:00:00ZReal-time macroeconomic forecasting, vintage reconstruction, and policy-shock analysis with public-source adapters. Mortgage Rate Lock-In and Housing Market Dynamicshttps://yangxiaoshawn.github.io/projects/realestate/2026-08-17T00:00:00ZReproducible housing-finance research on how mortgage rate lock-in relates to mortgage exits, local activity, prices, and residential construction. Tariff Incidence, Supply-Chain Reallocation, and Domestic Propagationhttps://yangxiaoshawn.github.io/projects/tariff-incidence/2026-08-17T00:00:00ZReproducible research on how the 2018–2019 U.S. Section 301 tariffs affected landed costs, customs unit values, import quantities, sourcing, and downstream industry exposure.