Fig. 1
From: Use coal or invest in renewables: a real options analysis of energy investments in the Philippines
Option values of various renewable energy sources. Note geo_0, geo_T, wind_0, wind_T, hydro_0, hydro_T, solar_0, and solar_T are option values for investment in geothermal, wind, hydropower, and solar PV at the initial (0) and terminal (T) period of investment (see Additional file 1: Table S3 for the simulation result)