155459document55231Measuring the duration of formative phases for energy technologies.pdfapplication/pdf088b1131dd9fa014f1e2ea07ff76e863MD512397952016-05-12 08:48:25https://pure.iiasa.ac.at/id/eprint/13160/1/Measuring%20the%20duration%20of%20formative%20phases%20for%20energy%20technologies.pdf