Papers by Nguyen Khong Quan
Caged Sensors, Regulators and Compounds and Uses Thereof
Lightweight Audio System for Automotive Applications and Method
This paper compares the patterns of income transfers within village communities in the north and ... more This paper compares the patterns of income transfers within village communities in the north and south of Vietnam by analyzing survey and experimental data. The results of household data analysis show private transfers flow from high-income households to low-income households in the south where the social safety net is limited. In contrast, private transfers do not correlate with pre-transfer income in the north where public transfers are more widespread. In addition, public transfers crowd out private transfers in the north. The result of subjective survey data analysis also indicates people in the south favor redistribution to the poor. We conducted a trust game in both regions and found consistent results. People in the south are more altruistic toward the poor: they send more to the poor without expecting higher repayment. Private norms of redistribution from rich to poor appear to be active in the south, but are crowded out in the north by public redistribution.
Lecture Notes in Computer Science, 2006
One-way hash chains have been used in many micropayment schemes due to their simplicity and effic... more One-way hash chains have been used in many micropayment schemes due to their simplicity and efficiency. In this paper we introduce the notion of multi-dimensional hash chains, which is a new generalization of traditional one-way hash chains. We show that this construction has storage-computational complexity of O(log 2 N) per chain element, which is comparable with the best result reported in recent literature. Based on multi-dimensional hash chains, we then propose two cash-like micropayment schemes, which have a number of advantages in terms of efficiency and security. We also point out some possible improvements to PayWord and similar schemes by using multi-dimensional hash chains.
Levine's Bibliography, 2006
We conducted field experiments to investigate how wealth, political history, occupation, and othe... more We conducted field experiments to investigate how wealth, political history, occupation, and other demographic variables (from a comprehensive earlier household survey) are correlated with risk, time discounting and trust in Vietnam. Our experiments suggest risk and time preferences depend on the stage of economic development. In wealthier villages, people are less loss-averse and more patient. Our research also shows people who participate in ROSCAs (rotating credit associations) are more patient than non-participant, but those who participate in bidding ROSCAs are less patient and more risk averse than those who participate in fixed ROSCAs. Results from a trust game demonstrate both positive and negative effects of communism. Villagers in the South tend to invest more in low-income partners without expecting repayment. On the other hand, people in the north are more trustworthy but do not pass on more money to the poor. Our findings also suggest market activities, like starting a small trade business, are correlated with trust and trustworthiness. We also contribute to experimental methodology by using choices that separate different aspects of risk aversion and time preferences in behavioral economics specifications.
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Papers by Nguyen Khong Quan