A group of scientists questioned whether sustainable forest management (SFM) is an effective way as commonly believed to protect tropical forests and the habitat and carbon reserves. They published a study in the journal Land Use Policy arguing that SFM may not actually lead to less deforestation based on the their analysis of timber concessions in the Central African nation of the Republic of Congo. According to their research, timber concessions operating under forest management plans (FMPs) showed higher rates of deforestation than concessions without them. The research was criticized by some scientists as overly simplistic. One of the authors was hesitant to extend the findings beyond the borders of the Republic of Congo.