QaaS (quality as a service) model for web services using big data technologies

Quality of service (QoS) determines the service usability and utility and both of which influence the service selection process. The QoS varies from one service provider to other. Each web service has its own methodology for evaluating QoS. The lack of transparent QoS evaluation model makes the service selection challenging. Moreover, most QoS evaluation processes do not consider their historical data which not only helps in getting more accurate QoS but also helps for future prediction, recommendation and knowledge discovery. QoS driven service selection demands a model where QoS can be provided as a service to end users. This paper proposes a layered QaaS (quality as a service) model in the same line as PaaS and software as a service, where users can provide QoS attributes as inputs and the model returns services satisfying the user’s QoS expectation. This paper covers all the key aspects in this context, like selection of data sources, its transformation, evaluation, classification and storage of QoS. The paper uses server log as the source for evaluating QoS values, common methodology for its evaluation and big data technologies for its transformation and analysis. This paper also establishes the fact that Spark outperforms the Pig with respect to evaluation of QoS from logs.     

Trade implications of the Euro in EMU countries: a panel gravity analysis

In this paper, we study the intra-EMU and intra-Eurozone trade effects of the euro adoption on 29 European Economic and Monetary Union countries (including 17 Eurozone economies and Iceland) from the period 1994 through 2011. We employ a generalized gravity model that controls for an extended set of trade theory and policy variables. The gravity model is estimated using the robust panel data techniques that includes times effects, besides country-specific effects. The various econometric specifications of the gravity equation, on the whole dataset of 29 economies, yield positive and significant impact (to be around 14 %) of the euro currency adoption on bilateral trade flows. Next, euro effect on bilateral trade and exports on a smaller dataset is estimated. The estimated results suggest that bilateral trade and exports increase by 20.81 and 18.57 %, respectively, when both the countries belong to the Eurozone. This effect is larger than the one obtained when only one of the two trading partners uses the euro as its currency. In addition, the validity of the assumptions of Heckscher–Ohlin (H–O) theory are checked for the countries under study. The estimated results reject the H–O theory in favor of Modern Trade theories. However, the low value of the coefficient on respective variable suggests that, over the period, the type of trade among these countries has transited from inter-industry trade to horizontal intra-industry trade. This suggests that these developed European economies are on the path of economic convergence via intra-industry trade.     

The effects of community factors on residents’ perceptions toward World Heritage Site inscription and sustainable tourism development

Using partial least squares-structural equation modeling, we analyzed data from 410 questionnaires completed by a sample of residents from the vicinity of the George Town World Heritage Site (WHS), Malaysia, to investigate the effects of community factors on residents’ perceptions and support for WHS conservation and tourism development. To conceptualize these relationships, we developed a framework based on social exchange theory (SET) and previous empirical evidence. While community attachment, cultural attitudes, community involvement, and community gain had positive effects on residents’ perceptions, the effects of community members’ gain and status consistency were particularly strong. Our results suggest that perceptions strongly influence support for WHS conservation and tourism development. Having examined a number of new resident perception factors, this study makes a significant theoretical and methodological contribution to the tourism and resident perception literature. Furthermore, this study has practical implications for future sustainable community development in the George Town WHS.     

Temporal aggregation and purchasing power parity persistence

This paper uses a unique new monthly US-UK real exchange rate series for the January 1794-December 2009 period to reexamine the academic debate over purchasing power parity (PPP). The consensus view described by Rogoff (1996) is that PPP holds in the long-run, but short-run deviations are very persistent, with half-lives ranging from 3 to 5 years. Most of the literature using long time series relies on the annual data developed by Lee (1976) and Lothian and Taylor (1996), which were both constructed from underlying higher-frequency data sources. Estimates of purchasing power parity persistence using these series may therefore be subject to temporal aggregation bias. We find evidence of aggregation bias which indicates the half-life of PPP deviations has been overestimated in much of the previous literature. We also find that estimates of the half-lives are further reduced once we account for the Harrod (1933)-Balassa (1964)-Samuelson (1964) effect. The result of aggregation bias appears to be robust even when considering the case that real exchange rates exhibit nonlinear dynamics.     

Linkages between income inequality,international remittances and economic growth in Pakistan

This paper explores the dynamic linkages between income inequality, international remittances and economic growth using time series data over the period of 1976–2006 in case of Pakistan. The cointegration analysis based on the bounds test confirms the existence of a long-run relationship between income inequality, international remittances and economic growth. Our results reveal that income inequality and international remittances enhance economic growth. The causality analysis based on innovative accounting approach shows bidirectional causal relationship between income inequality and economic growth and same is true for international remittances and income inequality. International remittances are cause of economic growth but not vice versa. Although we find support for Kuznets hypothesis but Pakistan is yet to benefit, in terms of reducing the gaps of income inequality, from the international flow of remittances and economic growth. The paper argues that, from a policy perspective, there is an urgent need for policy makers in Pakistan to reduce the widening gap of income inequality by focusing on income redistribution policies and to go beyond the traditional factors in balancing income inequality.     

High and low frequency variations and the cyclical behaviour of real wages

The conflicting empirical evidence on the cyclicality of real wages may be a result of the fact that the measure of comovements employed in the literature is affected by coherence among non-business cycle variations in the data. By recursively removing components the degree to which long- and short-term cycles contaminate the existing evidence is studied. While confirming many of the results of the current literature, it is found that evidence of cyclicality is affected more by long rather than by short-term components, even though the data have been detrended by a number of different methods. It has been suggested in the literature that wages become more countercyclical as the deflators used represent less finished bundles of goods. This study shows that this result is robust to the removal of components from either end of the spectrum.     

Pricing of mobile phone attributes at the retail level in a developing country: Hedonic analysis

This study has been undertaken to determine the effect of mobile phone attributes on their retail market prices. A log-linear hedonic price model was fitted to a total of 348 handsets, for which data were collected about various attributes from different websites, while the price data were obtained from mobile phone retailers in two major cities of Pakistan from November 2016 to February 2017. Results indicate that brand, battery capacity, weight, operating system, RAM, memory size and display size have a significant positive effect on mobile phone prices. Given the significant premium associated with various characteristics, manufacturers need to formulate strategies to emphasize the battery capacity of 2000-3000?mAH, RAM of more than 1GB, screen size of more than 5 inches, memory size of more than 8GB, back camera of over 15MP, 4G network mode, front camera and FM radio.     

Saving dynamics in the Asian countries

This paper investigates empirically the factors that have influenced the savings behavior in the fast growing Asian economies—Singapore, South Korea, Malaysia, Thailand and the Philippines. Both the short and long-run movements of savings are modeled during the 1960–1997. The empirical results of the analysis based on time series data may be summarized as follows: (i) foreign savings deters domestic saving both in the short and long run; (ii) savings does not Granger cause economic growth, except for Singapore; (iii) the effect of interest rate on saving in Asian countries is inconclusive and it reflects the extent of financial liberalization adopted in these countries; and (iv) in the long run the causality runs from foreign to domestic savings.     

The international spillover of china’s monetary policy: a case study of a developing country

This paper aimed to investigate the evidence on the transmission of China’s monetary policy shocks to macroeconomic variables in Iran. Since 1990, China has become one of the main trading partners of Iran; therefore, it is expected that China’s macroeconomic shocks have some consequences on Iran’s Economy. In this study, a structural vector autoregressive model is used to explore such a transmission. The findings of the study reveal that the China’s monetary policy changes significantly affect the Consumer Price Index (CPI) as Iran’s CPI meaningfully increases with the expansion of China’s money supply. Furthermore, it was found that Iran’s other economic variables, including the real GDP, real effective exchange rate, and interest rate, do not significantly reflect the China’s monetary shocks; even though confirm the expected sign and direction.