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OLS regressions have a set of assumption in order to have its point and interval estimates to be unbiased and efficient. Data missing not at random (MNAR) can pose serious estimations issues in the linear regression. In this study we evaluate the performance of OLS confidence interval estimates with MNAR data. We also suggest bootstrapping as a remedy for such data cases and compare the traditional confidence intervals against bootstrap ones. As we need to know the true parameters, we carry out a simulations study. Research results indicate that both approaches show similar results having similar intervals size. Given that bootstrap required a lot of computations, traditional methods is still recommended to be used even in case of MNAR

  • Ўқишлар сони 48
  • Нашр санаси 31-05-2024
  • Мақола тилиIngliz
  • Саҳифалар сони492-502
Ўзбек

ОЛС регрессиялари нуқта ва интервалларни холис ва самарали баҳолаш учун бир қатор фаразларга эга. Тасодифий йўқолган маълумотлар (МНАР) чизиқли регрессияни баҳолашда жиддий муаммоларни келтириб чиқариши мумкин. Ушбу тадққотда биз МНАР маълумотлари билан ОЛС ишонч оралиғи баҳоларининг ишлашини баҳолаймиз. Биз, шунингдек, бундай маълумотлар ҳолатлари учун восита сифатида юклашни таклиф қиламиз ва анъанавий ишонч оралиқларини боотстрап билан солиштирамиз. Ҳақиқий параметрларни билишимиз кераклиги сабабли, биз симуляция тадқиқотини ўтказамиз. Тадқиқот натижалари шуни кўрсатадики, иккала ёндашув ҳам ўхшаш оралиқ ўлчамига эга ўхшаш натижаларни кўрсатади. Боотстрап жуда кўп ҳисобкитобларни талаб қилишини ҳисобга олиб, анъанавий усулларни МНАР ҳолатида ҳам қўллаш тавсия этилади.

Русский

Регрессии OLS имеют набор допущений, чтобы точечные и интервальные оценки были несмещенными и эффективными. Отсутствие данных не случайно (MNAR) может создать серьезные проблемы с оценками в линейной регрессии. В этом исследовании мы оцениваем эффективность оценок доверительного интервала OLS с данными MNAR. Мы также предлагаем загрузку как средство решения таких случаев данных и сравниваем традиционные доверительные интервалы с загрузочными интервалами. Поскольку нам необходимо знать истинные параметры, мы проводим моделирование. Результаты исследования показывают, что оба подхода показывают схожие результаты при одинаковом размере интервалов. Учитывая, что бутстрап требует большого количества вычислений, традиционные методы по-прежнему рекомендуется использовать даже в случае MNAR

English

OLS regressions have a set of assumption in order to have its point and interval estimates to be unbiased and efficient. Data missing not at random (MNAR) can pose serious estimations issues in the linear regression. In this study we evaluate the performance of OLS confidence interval estimates with MNAR data. We also suggest bootstrapping as a remedy for such data cases and compare the traditional confidence intervals against bootstrap ones. As we need to know the true parameters, we carry out a simulations study. Research results indicate that both approaches show similar results having similar intervals size. Given that bootstrap required a lot of computations, traditional methods is still recommended to be used even in case of MNAR

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