مقایسهٔ روش‌ها

	رگرسیون کوانتایل-بر-کوانتایل با پارامترهای متغیر در طول زمان (TVP-QQ)	رگرسیون کوانتایل-بر-کوانتایل (QQ)
حوزه	اقتصادسنجی	اقتصادسنجی
خانواده	Regression model	Regression model
سال پیدایش	2015–2019	2015
پدیدآور	Extension of Sim & Zhou (2015) QQ framework; TVP adaptation by subsequent applied econometricians	Sim and Zhou
نوع	Nonparametric time-varying quantile regression	Nonparametric quantile regression
منبع بنیادین	Sim, N., & Zhou, H. (2015). Oil prices, US stock return, and the dependence between their quantiles. Journal of Banking & 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.
نام‌های دیگر	TVP-QQ regression, time-varying QQ regression, dynamic quantile-on-quantile regression, TVP quantile-on-quantile	QQ regression, QQ approach, quantile-on-quantile approach, nonparametric quantile regression
مرتبط	2	6
خلاصه	TVP-QQ regression extends the quantile-on-quantile (QQ) framework by allowing the slope coefficients to evolve over time. It maps how the quantiles of a predictor variable affect the quantiles of an outcome differently across the joint distribution and across different time periods, uncovering dynamic, heterogeneous dependence structures that standard regression cannot detect.	Quantile-on-quantile regression is a nonparametric technique that estimates how the quantiles of one variable depend on the quantiles of another. By combining standard quantile regression with local linear smoothing, it produces a full two-dimensional surface of slope coefficients indexed by both the quantile of the outcome and the quantile of the predictor, revealing heterogeneous and asymmetric dependency structures invisible to standard regression.