Llopis-Albert, C. and Mena-Vásquez , A. 2026. Measuring Tourism Accommodation Efficiency under Environmental and Structural Constraints: A Multi‑Stage DEA–Malmquist Approach for the Valencian Community (Spain). JOINETECH. 2, 1 (May 2026), 19–32. DOI:https://doi.org/10.65479/joinetech.39.