Detecting the Influence of Spreading in Social Networks with Excitable Sensor Networks

Detecting spreading outbreaks in social networks with sensors is of great significance in applications. Inspired by the formation mechanism of human's physical sensations to external stimuli, we propose a new method to detect the influence of spreading by constructing excitable sensor networks. Exploiting the amplifying effect of excitable sensor networks, our method can better detect small-scale spreading processes. At the same time, it can also distinguish large-scale diffusion instances due to the self-inhibition effect of excitable elements. Through simulations of diverse spreading dynamics on typical real-world social networks (facebook, coauthor and email social networks), we find that the excitable senor networks are capable of detecting and ranking spreading processes in a much wider range of influence than other commonly used sensor placement methods, such as random, targeted, acquaintance and distance strategies. In addition, we validate the efficacy of our method with diffusion data from a real-world online social system, Twitter. We find that our method can detect more spreading topics in practice. Our approach provides a new direction in spreading detection and should be useful for designing effective detection methods

An Empirical Investigation of Purchasing Power Parity for a Transition Economy - Cambodia

This study has found an empirical support of Purchasing Power Parity (PPP) theory for an East Asia transition economy – Cambodia. It is based on the results of cointegration among KHR/USD, Cambodia CPI, and world CPI over the monthly period May 2001-February 2009. This finding is useful for policy implications i.e. de-dollarization (and exchange rates) policy designs in Cambodia.Cambodia; Dollarization; Exchange Rates; Purchasing Power Parity

Purchasing Power Parity (PPP) in a Transition Economy - Cambodia: Empirical Evidence from Bilateral Exchange Rates

This study contributes to the existing literature by examining the validity of PPP hypothesis for Cambodia. The standard unit root tests (ADF and PP) and the panel unit root tests fail to support PPP hypothesis for the nine Cambodia’s trading partners. The unit root tests with structural break support the PPP hypothesis for the bilateral real exchange rates of Euro, Indonesia rupiah, Malaysia ringgit, and Singapore dollar. This finding is found to be relevant for ‘de-dollarization’ strategy in Cambodia, and in responding to recent global financial crisis (2007-2008).Cambodia; Dollarization; Exchange Rates; Purchasing Power Parity

An empirical investigation of purchasing power parity for a transition economy - Cambodia

This study has found an empirical support of Purchasing Power Parity (PPP) theory for an East Asia transition economy – Cambodia. It is based on the results of cointegration among KHR/USD, Cambodia CPI, and world CPI over the monthly period May 2001-February 2009. This finding is useful for policy implications i.e. de-dollarization (and exchange rates) policy designs in Cambodia.Cambodia; Dollarization; Exchange Rates; Purchasing Power Parity