Who is priced when a province becomes the centre? Equity-market evidence on spatially targeted political information in Vietnam

Firm-level event-study dataset for Ngo (2026), "Who is priced when a province becomes the centre?" Four files: firm panel (N=628, 36 variables including CAR windows, firm characteristics, PCI governance scores, and GRDP data), cluster summary (23 merger clusters), robustness table (15 specifications replicating Table 5), and variable codebook. Data sources: HOSE/HNX exchange filings, VCCI PCI 2024, GSO GRDP.