เปรียบเทียบวิธี

	การถดถอยควอนไทล์บนควอนไทล์แบบฟูเรียร์	การถดถอยควอนไทล์บนควอนไทล์ของข้อมูลแผง (Panel Quantile-on-Quantile Regression)
สาขาวิชา	เศรษฐมิติ	เศรษฐมิติ
ตระกูล	Regression model	Regression model
ปีกำเนิด	2015-2020s	2015 (QQ); panel applications from ~2018
ผู้ริเริ่ม	Extension combining Sim & Zhou (2015) QQ regression with Fourier flexible-form smoothing	Sim and Zhou (cross-section QQ); panel extension in applied energy/finance econometrics
ประเภท	Nonparametric quantile regression with Fourier smoothing	Nonparametric quantile regression
แหล่งต้นตำรับ	Sim, N., & Zhou, H. (2015). Oil prices, US stock return, and the dependence between their quantiles. Journal of Banking and Finance, 55, 1-8.	Sim, N., & Zhou, H. (2015). Oil prices, US stock return, and the dependence between their quantiles. Journal of Banking and Finance, 55, 1-8.
ชื่อเรียกอื่น	Fourier QQ regression, Fourier-QQR, Fourier quantile regression with quantile regressors, smooth structural-break QQ regression	Panel QQ regression, panel QQ approach, panel quantile-on-quantile approach, PQQ regression
ที่เกี่ยวข้อง	6	6
สรุป	Fourier quantile-on-quantile regression extends the quantile-on-quantile (QQ) framework of Sim and Zhou (2015) by embedding Fourier trigonometric terms into the local linear quantile model. This allows the estimated dependence between the quantiles of one variable and the quantiles of another to vary smoothly over time, capturing gradual structural change without imposing a known break date.	Panel quantile-on-quantile (QQ) regression jointly maps any quantile of the outcome distribution onto any quantile of the predictor distribution across multiple cross-sectional units observed over time. It generalises Sim and Zhou's (2015) cross-sectional QQ framework to a panel setting, revealing a full dependence surface rather than a single average effect, while accounting for individual heterogeneity through fixed or random effects correction.