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War, coal, and forced labor : assessing the impact of prisoner-of-war employment on coal mine productivity in World War I Germany
Jopp, Tobias Alexander - In: The journal of economic history 81 (2021) 3, pp. 763-791
Persistent link: https://www.econbiz.de/10012618383
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How technologically progressive was Germany in the interwar period? : evidence on total factor productivity in coal mining
Jopp, Tobias Alexander - In: The journal of economic history 76 (2016) 4, pp. 1113-1151
Persistent link: https://www.econbiz.de/10011594864
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Determinants of mine closures in a declining industry : the example of West German hard-coal mining after World War Two
Jopp, Tobias Alexander - In: Economics letters 226 (2023), pp. 1-5
Persistent link: https://www.econbiz.de/10014312563
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Did closures do any good? : labour productivity, mine dynamics, and rationalization in interwar Ruhr coal mining
Jopp, Tobias Alexander - In: The economic history review : a journal of economic and … 70 (2017) 3, pp. 944-976
Persistent link: https://www.econbiz.de/10011715595