A design approach is offered for individual tariffs for mass customized mobile service products, whereby operators can determine their contract acceptance rules to guarantee with a set probability their minimum profit and risk levels. It uses realistic improvements to earlier reported...

We uncover interesting opposite effects of jumps in stock prices on three kind of stock returns: close-to-close expected return, and its two components, namely overnight and intraday return, when heterogeneous investors are confronted with different types of news during trading hours and...

Random graph theory has become a major modeling tool to study complex systems. In this paper we apply random graph theory to analyze bipartite consumer-product graphs that represent sales transactions to better understand consumer purchase behavior in e-commerce settings. Based on two real-world...

Corporate lobbying activities are designed to influence legislators, regulators, and courts, presumably to encourage favorable policies and/or outcomes. In dollar terms, corporate lobbying expenditures are typically one or even two orders of magnitude larger than spending by Political Action...

This paper introduces a conceptual framework and a computational model for individual tariffs for mobile communication services. The purpose is to provide guidance for implementation by communication service suppliers or user groups alike. The paper first examines the sociological and economic...

For predictive quantile regressions with highly persistent regressors, a conventional test statistic suffers from a serious size distortion and its limiting distribution relies on the unknown persistence degree of predictors. This paper proposes a double-weighted approach to offer a robust...

We regard accounting regulation as a politico-economic institution and analyze its evolution in the presence of changing investor sentiment. When the market sentiment is moderate, if most of the business projects in the economy are successful, the economy will enter a stable high-disclosure...

Corporate insiders, particularly managers, not only have access to their firms' private information, but also control over their firms' operational decisions. In this paper, we consider a setting where managers manipulate the firms' real activities in anticipation of subsequent insider trading...

We use daily transaction data in 214 cities to study the impact of COVID-19 on consumption after China's outbreak in late January 2020. Based on difference-in-differences estimation, daily offline consumption—via UnionPay card and QR scanner transactions—fell by 32%, or 18.57 million RMB per...