林业治沙重点工程公共投资绩效研究

在构建林业治沙内生增长模型的基础上,本文采用1993-2011年和1991-2011年的数据分别对两类国家林业治沙重点工程公共投资绩效进行实证研究.结果表明,在京津工程中,公共投资的产出效应显著,但却存在并不显著的挤出效应.而在三北工程中,平均公共投资低很多、产出效应近似显著,其挤入效应非常显著,私人资本产出效应也非常显著.因此,为了提高绩效,要增加三北工程投资,保护私人造林产权,减少地方政府干预,完善集体林权制度改革等,并提高生态补偿标准、大力发展沙草产业和不断改进林业治沙技术.

The Performance of Public Investments in Forestry Sand-Control Projects in China

The paper presents an endogenous economic growth model of forestry sand control projects in a representative economy. We analyze the performance of public investment including the crowding-in effect and output effect with data from 1993 to 2011 for the Jingjin Project and data from 1991 to 2011 for the Three North Project, respectively. The results show more public investments per unit area and more significant output effects, but insignificant crowding-in effects of public investment for the Jingjin Project. There is lower public investment per unit area, more significant crowding-in effects and nearly significant output effects of public investment for the Three North Project. More public investment should be invested in the Three North Project rather than in the Jingjin Project to raise the performance of public investment of forest sand control projects. In addition, less administrative intervention is needed. Reforms such as collective forestry claims should be continually perfected to protect the claims of private forestation and grass planting. More ecological compensation must be provided to foresters to encourage the ecological construction of forestry sand control projects. Sand grass industries should be developed to promote the revenue and reduce the positive externality effect of forestry sand control projects. Advanced technology should be developed for sand control projects for forestation and grass plantation in China to cut the related costs, promote performance and improve the return of scale of forestry sand control projects.