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Risk and return in transportation and other US and global industries
Kavussanos, Manolis G., (2001)
Risk and Return in Transportation and Other US and Global Industries
Markoulis, Stelios, (2014)
On returns to scale and input substitutability in slave agriculture
Zepp, Thomas M., (1976)
Utility stocks and the size effect--revisited
Zepp, Thomas M., (2003)