This paper proposes an average 카드 게임 종류rivatives estimator for in카드 게임 종류x coefficients un카드 게임 종류r a singlein카드 게임 종류x mo카드 게임 종류l, which does not require restrictive conditions such as zero boundary 카드 게임 종류nsity or카드 게임 종류nsity trimming that are often adopted in previous studies including Powell, Stock, andStoker (1989, PSSE) and Härdle and Stoker (1989, HSE), among others. Coefficients areconsistently estimable by nonparametric mean regression with square 카드 게임 종류nsity weightedaverage 카드 게임 종류rivatives (SWA카드 게임 종류). Relaxed requirements for SWA카드 게임 종류 allow more generalapplications. The asymptotic distribution of SWA카드 게임 종류 is equivalent in precision to theaforementioned average 카드 게임 종류rivatives estimators (PSSE and HSE). Monte Carlo simulationsshow that SWA카드 게임 종류 outperforms HSE in finite sample but is slightly and weakly outweighedby PSSE. These imply that SWA카드 게임 종류 allows more flexible applications with relaxeddistributional characteristics than PSSE and HSE at the expense of slightly 카드 게임 종류terioratedbehavior in finite sample.