Research on the relationship between R & D investment, investment efficiency and total factor productivity of coal enterprises

WANG Yuting, FANG Ruirui, LI Lihong, FENG Lianyong

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Coal Economic Research ›› 2025, Vol. 45 ›› Issue (8) : 14-20.

Research on the relationship between R & D investment, investment efficiency and total factor productivity of coal enterprises

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