Consider a semiparametric model yi = xi' beta + g(ti )+ei; i = 1;2..., n, error ei are i.i.d. random variables from unknown distribution f(e). In this paper, we propose a nonlinear wavelet estimator ^f(e) of f(e) based on residuals ê =yi - ^yi here restriction of uniformly continuous on f(e)...

The rate of incarceration has increased dramatically in the US since 1980. We explore the implications of this increased incarceration on national poverty measurement using micro data for the period 1979-1997. We make use of an as-yet unexplored data set on prisoner earnings, in conjunction with...

How do firms adjust prices in the marketplace? Do they tend to adjust prices infrequently in response to changes in market conditions? If so, why? These remain key questions in macroeconomics, particularly for central banks that work to keep inflation low and stable. The authors use the Bank of...

In 2020, as the novel coronavirus spread globally, face masks were recommended in public settings to protect against and slow down the spread of the coronavirus. Why did people comply, or not, while shopping in 2020? Do these motivations relate to their shopping behaviors? Based on the recent...

This study employs a fxed-efects model to investigate the holiday efect in the cryptocurrency market, using trading data for the top 100 cryptocurrencies by market capitalization on Coinmarketcap.com from January 1, 2017 to July 1, 2022. The results indicate that returns on cryptocurrencies...

The introduction of tablets in online retailing has created an additional touch point through which e-commerce firms can interact with consumers. In this paper, we seek to understand and measure the causal impact of tablets on e-commerce sales. In doing so, we examine the complementary and...

In this paper, we propose a unified framework for the Sen indices of poverty intensity that shows an explicit connection between the indices and the common underlying social evaluation function. We also identify the common multiplicative decomposition of the indices that allows simple and...

As an extension to the Fama and French three factor model (FF), this paper investigates the time-varying risk premiums of sector exchange traded funds (ETF) under a Markov regime-switching framework. In addition to the three style factors in the FF model, three macro factors: changes in market...

The transformative impact of AI technologies on the financial sector has been a topic of increasing interest. This study investigates ChatGPT's applications in financial reasoning and analysis and evaluates ChatGPT-4o's effectiveness and limitations in conducting both basic and complex financial...