Nonparametric Estimation of Common Regressors for Similar Curve Data
相似曲线数据中共同回归函数的非参数估计AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要虽涉及共同函数与主成分,但研究对象是一般曲线数据,不能据此归入宏观或金融因子。
相似曲线数据中共同回归函数的非参数估计AI 解读 ↓
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The paper is concerned with data from a collection of different, but related, regression curves $(m_j0_{j = 1}, \ldots, N, N \gg 1$. In statistical practice, analysis of such data is most frequently based on low-dimensional linear models. It is then assumed that each regression curve $m_j$ is a linear combination of a small number $L \ll N$ of common functions $g_1, \ldots, g_L$k. For example, if all $m_j$'s are straight lines, this holds with $L = 2, g_1 \equiv 1$ and $g_2(x) = x$. In this paper the assumption of a prespecified model is dropped. A nonparametric method is presented which allows estimation of the smallest $L$ and corresponding functions $g_1, \ldots, g_L$ from the data. The procedure combines smoothing techniques with ideas related to principal component analysis. An asymptotic theory is presented with yields detailed insight into properties of the resulting estimators. An application to household expenditure data illustrates the approach.
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