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Long-term trends need long-term data. With panel surveys, researchers track changes over time and spot real shifts in behavior. Your ongoing participation creates value — still waiting, still contributing.
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National Sample - market and social research in the Czech Republic, Slovakia, Poland, Romania, Hungary, Bulgaria, Ukraine and Thailand.
Время панелей
Если ты долго наблюдаешь за настроением большого количества жуков, у тебя получаются панельные данные. Разбор полетов панелей начинается с проблемой Pooled-моделей в STATA:
Poled-модели в STATA считаются как обычные OLS регрессии, используя панельные данные (сурс тут)
Что делать с показателями качества моделей? Не ясно, Вербик (стр. 514) рассказывает, что в случае МНК-оценок можно использовать и обычные коэффициенты детерминации (R2 и adjR2).
Pooled-модели сами по себе не очень интересненькие, во многом они похожи, по моему мнению, на системы одновременных уравнений.
В моделях с фиксированными эффектами (FE) уже все иначе. Они вообще включают в себя теперь и дополнительную компоненту, моделирующую эти эффекты:
Legitimacy's Negativity Bias after Court Decisions We find evidence of both sensitivity to outputs and negativity bias for the gay marriage issue. Greater support for gay marriage is associated with higher legitimacy rankings to begin with. However, those most supportive of gay marriage did not massively reward the Court. Rather, the “losers,” or those that were most opposed to gay marriage, were more likely to punish the Court with lower legitimacy evaluations immediately following the DOMA decision.
