Replication package: Reconstructing Grid Emission Intensity for Poland and Testing Its Response to EU ETS Carbon Prices (MethodsX)

Complete replication package for the MethodsX article "Reconstructing Grid Emission Intensity for Poland and Testing Its Response to EU ETS Carbon Prices: A Replicable Two-Source Triangulation Protocol" (manuscript MEX-D-26-00442). Contains: (1) raw data with full provenance — nine official KOBiZE emission-factor reports (2014–2022) with page-level value metadata, UNFCCC CRT category 1.A.1.a extraction with cell-level addresses (submission POL-CRT-2024-V0.1), scripted Eurostat API pulls (nrg_bal_c TI_EHG_E, nrg_cb_e GEP, env_ac_ainah_r2), and 5,349 daily EUA secondary-market prices from the ICAP Allowance Price Explorer; (2) processed canonical series (EF_grid reconstruction worksheet, annual EUA means, VAR input 2008–2022); (3) R scripts 01–04 (base R, no dependencies) reproducing every table and figure, with independent Python cross-checks agreeing to three decimals; (4) output tables. See README.md for the provenance table and step-by-step instructions.