v0.4.9 — bundle the bolivia112_gdppc subnational convergence panel

Added

• Data: a new bundled bolivia112_gdppc dataset — a real-world balanced panel of 112 Bolivian provinces (nested within 9 departments) over 1990-2024 with GDP per capita and its natural log; the empirical counterpart to the synthetic productivity panel, for the convergence workflows (analyze_beta_convergence / analyze_sigma_convergence / analyze_convergence_clubs) and general subnational exploration. Load with load_bolivia112_gdppc() / load_bolivia112_gdppc_data_def().

Source: Kummu, Kosonen & Masoumzadeh Sayyar, "Downscaled gridded global dataset for GDP per capita PPP over 1990-2022," Sci Data 12, 178 (2025), https://doi.org/10.1038/s41597-025-04487-x