CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '9135f5c93a92fd33',cH: 'JvJfM5PbUCl7PgnppIRFNKfpVeh3FDfhtcOALEnfRJI-1739797223-1.2.1.1-0htRqN8eN587SNe2kOajnKQTZB7VJB8mqmyrpFSlj1slVJaVxKwNLn5Hbuw4OYXx',cUPMDTk: "\/abstracts\/search?q=quantile%20regression&page=108&__cf_chl_tk=CayU8ofSX9AY7VrWybaPM2prgfTl08PRq13kxPnuHmI-1739797223-1.0.1.1-25Dfg3KLLIVRRx._D87mfSqiaH3BMcaP7ppmz6vTLzc",cFPWv: 'b',cITimeS: '1739797223',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=quantile%20regression&page=108&__cf_chl_f_tk=CayU8ofSX9AY7VrWybaPM2prgfTl08PRq13kxPnuHmI-1739797223-1.0.1.1-25Dfg3KLLIVRRx._D87mfSqiaH3BMcaP7ppmz6vTLzc",md: "iUDzU_jOLZgVc3vSr_4qqC3BToF7w2cEUuEtHlIVe20-1739797223-1.2.1.1-em1Z_H3NAdA_C8_5iwhEj.pNfWFQFFaxnzLoYcfR8v_MxaoO8LHMfDt1Q7R2eMFWsC94lJJORE5patyDmMkAu3K4QDXb2ojFrMZJq.mi5mjV1QyCB2pTSmCzFxxqDnDPSs9ZQjqtKhAHtOxUwzZoqOzk_vjl1YYMrhf.Z60qYoZijNjvac.4nMm851Mj1BeJscX_X.SfjmlI..IoWUHtkr..LjCIO89g4bg0BmmKow7Fw0u7OeC2n3H7c5d6V_Z5PBvs4JtF7FEkae6wmqmPpG9K_GcDKyhp_xD51ZfeFThoQfM4cqn_8SptQ1JsYY.el9XQ0KqbsL4jCZ2khXtCdYqAB56Mx7fSOipUoipmOworVHksNkdv0OcF5yUvWEBES4NZqP1umH97zithKjqQqZ17Y2Lxr7HwNBmy63T0qIQK838.dnhAHJHv0gDkjpOVwPIRNE590_MBFlpOmb4gn.sDQlnrEnoO7G_LN3uRodz939TwdyrvTp8cRkTtaP18KtE6a07tSTriFE19Q3dthLtl5Y7izxrC1CP09iYCuMT5GMRxGlj5auz4NZtSAinfcr3U.YVpRo.ZbHlr2wp3k54tB2F58iCuNrpbakD.CliKOD9f0uhBAoo0pJzbbxGoWnXbZcZVJC8OANRb1Ld43mH7wyQhnRLwnAy8xWJ_WNDUIJhYxOjNShKczT0o9aLvQhDyxaj.JIjin69MUSTbQR4nMEkWM981VR3liyA0hVijaWiI0tb.InhwJfOwHsQShpJTXlKBPWmFTOdn7z7jf41Zv8x7GwqAbK3mnSPcUHojGWoTEm6GbTgxGbIVgYb4eWzHDqFZU9W41liEMG.kMkCReYCLrH4V2uEP3aJytFPFdaRztlsthX6H6FmxcqHTohRdoK_rU2J0ozTNXXruO_AzYCk1mBEcULrgC4g6ghMB1Xeiww3P81BSW3.z3f2KbeHSJ1nxX1bt2GYvH7zu4XiO7NIAFlhQ1fTM8oR4bn3yEgX_JqY4uN2NhDLR7VZ4Xbfa1WL6PJLl0mSxRlc0QsLG4OARQu5scnUlZIyAar7RBkdQt3.vmoFKOfmOhL7ANV.3tJQyqdFb3NcM1qx7YL7pC9DvlWMsdBdNCuwXDVBxOwINrWxpKnqQnAA3La2ssHfCQ18W3AIi8IIAGaC5YW_Ws7y6I_W4O44ksNq5uc7CUheZ1UgperDkKMkUQSAwyz7WSz8n2LMYTDoFjBq5MXESKMaiBOkJX8UlnUWmCe9SlymPFj7QmTdCc6AnAKTiONgEhSYZr1zGFtXqjn_F5n_nOf6syTPcSXXJqJo_IXb1xW3LvsfegmqK2X4ODT.010d5LZ9kpQuuGobZdaLp9WpAt.paJ5_SeXveysRNzWMutowyFu56dR4EJ4rWXQRT27tTM_wSd2TVt31f45m_BAlVmXJ2BQXOKPa1opJn4SQTKoi0sP8qV1nLtodEkTeN1FuKoJc8SsaV89JPLF3qKChv2PjJK9Dk.70NF54BIoA4IpqTyDnGvdXNEGNSgEp34gQgxAxPjJJhLElg1Hejyy8vpJPuhb8p5B9QtUbmi0tn7Vc.NqHfSwSyzjSDBB4B0OUY8.MkFOwjLIFjzmwIToIXuv9OHENsPHlB84Eey_E9Z83sk0Dfd2P.vjIXtwCmnd5G18thCEmePU0YIZkkqjSy3sCOdOPVWuzVNll5PwECCbQ7sD2cdlxw.DEe0SlhhTwXWAVsebu3rgsGGZ5JoyDdHBEwHDwiQGuMFOhuJounw2plxsycTLwvVFqPHuLMqL5Q5R_oYLcnrHGK1meeo1e6Rs8wAwIQfFCs4i6shfOqgqO87ByY2MIwouEG38.IGI45SowXLBrULbzUWtGwhzKR9SxtJ60xLsW2vl_r8EJuhSkHMXtrJzEK5UWGwSpUhzBOzrwwyo7QCduoQQRQzGstIGFTf_nSNYupX7kJBA2nUcHmtpYOeWAU7CCeuheQKww7yUbdqGaM2lNaxGdyYQ",mdrd: "QesLhQ41iUUlpcHyee4dkTOBzFxtjvgrEi7uUZYA76c-1739797223-1.2.1.1-qdzdsrN1VueXBZ3FNy87ntl8y6HCugAYByuyak.k4LKxeVovBaDGtBd3JMu5ISCw_5Ki1gzNw.i84ZptHyqX_kkdkFgplat3j8GatMWxune8vjc92KolKfq2ShZIf_rQPScHomOjRfnky6UJj15TOm.Sy64d6IiqnNelsKdNos8f_P_e2iSuHxK1HVCPqh_gb6I1s2jUnzxyZBSM7slSt.o0_f5WKjDGx0KefeshhutHs6vNwXs8AfWHHsKHXIlu_7XElBjqIqDMFLvrhMTzu60I2yLdLRSk3B92XJ3t9eMi0i3K3798wozoZXvI2mw3UW9NsgxPArgQisriXHdPE2DJDoOC6i3UzF4UdlOnVmZBer..1bkM4MeBUCe2Pq9cmvuzsTLBa_vEEBqY6yEqU3o9bjna6ItkddU50gBr4Kb.0q.XUKLxH1KJJqK4l8eQZY3AfKKGXNFBOrxwTSb_55eBzI1h4i_ZhLE2vYGozdHdOW8BIJ.35Wo2dfWtkv3yAmeBK9aEmIr5p_dxkimnN9YQjosW_17WOj2.IjCTG8WFE3KflaawaK.AwljKa_EGczRe4LRUO7_yCmT8woErDoAd2ZM9.9bELM1o3_S1npmAaQluk0AMkKSSNt8M.qDfKNFi_gJSO5r058lDrDoVEjgo7CYM4utNA3PZrLU9txTV7MYMcy7CYyHz2MAuN02CBdEM9UKDw3.Xa1eIhil.xmXlKXmZiPZi3olPtkfrjGCnSmMQ2SJaqxRi3nHaL9OTe0WKiLdPP_Nl4WKRdELH4PBL0qDq_o6sCtB8bMIXFPKdxjshQS1Tvl6A3PsamDAsi1Um6TlQBIVSxIhTtJQGl1Pf1wUUX80umHqoTk6XxqNODmovQ7ULzrRGxa2W7vAhHG2DWlfjNnAJUO90TOLK._72X.fqjRJdT80_ovwqp9w07f_jxIEVPT6mWPiGk8sqrzI6k96oCtPP9pyl9BDXp5py5.ND.bZzrw2UluczuNqdlRCgeO0uXZFwljL5HTxAxKc1aRkWedDErrDacMRX6Ev.6EF0jJD_sCDOm.l5v7k8Sg6L3rQp4zzVDvjhFYSkbenh.2u5v9_x79EeFZjuxcqekL6sJ3rQTEnbTn8L1.x4.1.0DGnMHPr3Ku0bqrdjQ2fuVz7cnEPJNhH6Kx2crjNMD0vB9Q3STgFH8cVISeOCyrQKyQ33_cvjIUII368.RscLKHHXySfcSnAHQHB1gAHKrsz7MxwmsxQerouQn_JDEvQ3azVNNTtbpLeUEb2eczxXBHwHHXl7_.l3vxlBqQD5wk9MY5gGSkrvs9hOsGiJea6bvXYEhoe9ympKgTjWAdHYPb7UixI2LHzK2UgHECAhMnYyrCdyxnreXN8s_wSNMFIueaX9rJPrYM3AsSEOxPdNlKv8hFTq0K7TRhLNaCR65tRnnBPFnjpB10EALIuM4lLwAD3gFkPhqu15Hu1MW9UbPbwJLD08KCtwaFDF6pCaGBNwFv3N5ax_AWgmhQZAugYtlKCwEvwodmGuYSQ0c6g481V46GRRBi90yDN2BMk8xPdc0n_J2xd_EH.mNos1OVj2W0HF4Zz4D_vK76z6RPNfyk9GRo47zqJpZrnwrIy34AVatguk7qnS7VUCrHwk8vR.6kf2uHQpcrvnE7b9NQUfHGgvDeB5_PhxDTLayd_g8X0653STGFvR5qPsngsKB0byy5me2mGimYZ36IyQqJD9hRx7_aFgqJFEWuM4Cl4kkPH0.ZeS_0smmwUx0UFE1LZ.aYIn0EE.lhcMoj12Ns1Cw8CtoJlHMzkM7nVznz4b90H67.zepdAkhrp11pl1tKyWW.C.rvQ7z_zZDjGdgG733NvPm.00lQwWZgUv5qy_k5JiDFV07UFkRC5Kx89mTjVOGBIDEGLOPE82YR1l5RB40s4i4OYM38X51Y0oBiah50xNZ7lYK0BFhpWu1gVWQvgLyh0fJkLddpaL3shWKwc2Pgm6YN7JYEoetIaLWg"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9135f5c93a92fd33';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=quantile%20regression&page=108&__cf_chl_rt_tk=CayU8ofSX9AY7VrWybaPM2prgfTl08PRq13kxPnuHmI-1739797223-1.0.1.1-25Dfg3KLLIVRRx._D87mfSqiaH3BMcaP7ppmz6vTLzc" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>