Research Publications Authored by SLIIT Staff
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This collection includes all SLIIT staff publications presented at external conferences and published in external journals. The materials are organized by faculty to facilitate easy retrieval.
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Publication Open Access Exploring the growth direction: the impact of exchange rate and purchasing managers index on economic growth in Sri Lanka(Springer Science and Business Media B.V., 2022-06-26) Jayathilaka, R; Rathnayake, R; Jayathilake, B; Dharmasena, T; Bodinayake, D; Kathriarachchi, DNumerous studies have been conducted, globally and locally, on the impact of the exchange rate on economic growth. In the local context, only a handful of research have investigated this area of study to determine the extent to which the Purchasing Managers’ Index infuence economic growth with the exchange rate, with limited research have been performed in Sri Lanka. This study explores the impact of exchange rate and Purchasing Managers’ Index on economic growth. Consequently, adopting an applied research methodology, the present study was based on secondary data published quarterly by the Central Bank of Sri Lanka reports and the Department of Census and Statistics of Sri Lanka from 2015 to 2021. The Vector autoregression model and Granger Causality Wald test were performed in this study. The empirical fndings highlighted that economic growth and Purchasing Managers’ Index have a signifcant negative impact on the economic growth, while the exchange rate had a signifcant positive impact on the economic growth. Furthermore, the exchange rate and the Purchasing Managers’ Index did not help to predict the exchange rate. The implications of the study demonstrate the relevance of the exchange rate and manufacturing Purchasing Managers’ Index as indicators of changes in overall economic growth activities at the macro level. The fndings will assist the Sri Lankan Government, policymakers, and foreign investors for efective decision making.Publication Open Access Factors influencing the timely completion of construction projects in Sri Lanka(Public Library of Science, 2022-12-15) Abeysinghe, N; Jayathilaka, RTimely completion is a crucial factor for the success of a construction project, especially in the Sri Lankan context. This study aims to identify the most influential factors that affect the timely completion of construction projects in Sri Lanka. Thirty-nine factors were identified through a comprehensive literature review and experts’ opinions. A questionnaire incorporating the 39 project delay factors was distributed among 163 Civil Engineers, and responses were obtained. Random sampling method was adopted to select the sample. The Relative Importance Index (RII) analysed and ranked the project delay factors. The top ranked significant project delay factors were identified as shortage of skilled subcontractors/suppliers, shortage of labourers (Skilled, semi-skilled, unskilled), financial difficulties of contractors, delay in delivering materials to the site, and Covid-19 pandemic situation. According to the main three respondent types, i.e., clients/owners, contractors and consultants, the contractor related factors was the key group among others that delay a construction project. The scientific value of the study includes assisting the Sri Lankan construction industry to identify the factors affecting the timely completion of construction projects, and developing mitigation methods and strategies. Also, the stakeholders could duly schedule the construction work by identifying areas that need more attention. The contribution of this study would assist stakeholders to adopt a proactive approach by identifying mistakes on their part and minimising potential issues that lead to construction project delays in Sri Lanka. FiguresPublication Open Access More than just investment: Causality analysis between foreign direct investment and economic growth(PLoS ONE, 2022-11-03) Nupehewa, S; Liyanage, S; Polkotuwa, D; Thiyagarajah, M; Jayathilaka, R; Lokeshwara, AThis study examines the causal nexus between Foreign Direct Investment (FDI) and the economic growth of seven (7) regions encompassing 117 countries. A more recent panel dataset over the period 2010–2020 was analysed using the Granger causality approach and panel VAR/block exogeneity test to conduct predictive analysis among the panel series. Wavelet coherence techniques too were adapted in bringing novelty and further justifications to the research in exploring the interaction effects of the variables, which are yet to be popularised in the studied discipline. The empirical results indicate the presence of bi-directional causality between FDI and economic growth globally and in the Asian region. In contrast, the causality is uni-directional in the American region. A non-directional causality was discovered in European, Oceanian, Mediterranean, and African regions, and the findings were consistent with the outcome of the wavelet coherence technique results. The study further classifies the regions into three cross-market categories such as developed, emerging and frontier markets. The results imply no causality for most developed and emerging economies in the regional analysis. Findings also provide insights for governments and policymakers worldwide to formulate policies on directing FDI flows and propositions for a host country to become a more conducive destination for FDI and accelerate economic growth.Publication Open Access Tourism and economic growth: A global study on Granger causality and wavelet coherence(PLoS ONE, 2022-09-12) Wijesekara, C; Tittagalla, C; Jayathilaka, A; Ilukpotha, U; Jayathilaka, R; Jayasinghe, PThis paper empirically investigates the relationship between tourism and economic growth by using a panel data cointegration test, Granger causality test and Wavelet coherence analysis at the global level. This analysis examines 105 nations utilising panel data from 2003 to 2020. The findings indicates that in most regions, tourism contributes significantly to economic growth and vice versa. Developing trade across most of the regions appears to be a major influencer in the study, as a bidirectional association exists between trade openness and economic growth. Additionally, all regions other than the American region showed a one-way association between gross capital formation and economic growth. Therefore, it is crucial to highlight that using initiatives to increase demand would advance tourism while also boosting the economy.Publication Open Access Tourism and economic growth: A global study on Granger causality and wavelet coherence(researchgate.net, 2022-09-12) Wijesekara, C; Tittagalla, C; Ilukpotha, U; Jayathilaka, A; Jayathilaka, R; Jayasinghe, PThis paper empirically investigates the relationship between tourism and economic growth by using a panel data cointegration test, Granger causality test and Wavelet coherence analysis at the global level. This analysis examines 105 nations utilising panel data from 2003 to 2020. The findings indicates that in most regions, tourism contributes significantly to economic growth and vice versa. Developing trade across most of the regions appears to be a major influencer in the study, as a bidirectional association exists between trade openness and economic growth. Additionally, all regions other than the American region showed a one-way association between gross capital formation and economic growth. Therefore, it is crucial to highlight that using initiatives to increase demand would advance tourism while also boosting the economy.Publication Open Access Driving the pulse of the economy or the dilution effect: Inflation impacting economic growth(PLOS ONE, 2022-08-19) Atigala, P; Maduwanthi1, T; Gunathilake, v; Sathsarani, S; Jayathilaka, REconomic growth becomes a critical component in the development of every country since it enhances living standards and other related concerns while eliminating poverty. As a developing country, Sri Lanka must place more emphasis to achieve sustainable economic growth. In addition, various factors have positive and negative impacts on economy’s growth. As such, the specific goals of any economy are to sustain long-term economic growth and low inflation. As a result, generally, high inflation is destructive for an economy and low inflation is beneficial. Therefore, it is worth investigating the impact of inflation on economic growth concerning a stable inflation level. This study examines the impact of inflation on economic growth in Sri Lanka by employing the Auto Regressive Distributed Lag model as the estimation technique. Furthermore, the findings illustrate a negative relationship between inflation and economic growth in the short run; when inflation increases by 1%, economic growth decreases by United States Dollar (USD) 3,427.94 million and long run economic growth declines by 107,263.8 million USD. Subsequently, with the current economic reality of Sri Lanka, the macroeconomic policies should be adaptable to maintain the stability of the inflation rate for a sustainable economy.Publication Open Access ESTIMATING WILLINNESS TO PAY FOR WETLAND CONSERVATION: A CONTINGENT VALUATION STUDY OF MUDUN ELA AND KALU OYA WATERSHEDS, WESTERN PROVINCE SRI LANKA(International Conference on "Water, Environment and Climate Change: Knowledge Sharing and Partnership, 2018-04-10) Jayathilaka, R; Serasinghe, PWetland ecosystems are often neglected or undervalued. Few people realize the range of products derived from wetlands and their freshwater habitats. There are a number of social and economic benefits of wetlands and the wetlands are in a serious risk today. Specially, in relation to human activities and in inconvenient utilization, wetlands around the globe are being modified, reclaimed and over-exploited due to high levels ofresource consumption, land conversion and also upstream developments that alter the quality and flow of water that feeds into them. Decision makers often have a little understanding of the environmental value of wetlands because wetlands are often perceived as having little or no value compared with uses that yield more visible and immediate economic benefits. In this circumstances, revelation and recognition of value of wetlands and thereafter the valuation their importance has been an essential matter which helps to protect such habitats and also it is useful to utilize the benefits of wetlands in a proper management. The objective of this study is to estimate the willingness to pay (WTP) for conservation of MudunEla and KaluOya watersheds, Western province Sri Lanka using Contingent Valuation Method (CVM). Respondents were randomly selected for data collection through face-to-face interview. The Tobit model was used to estimate the entrance fee to for conservation. The marginal effects on probabilities in the tobit model suggest that postgraduate degree holders, households who are using wetland as education, research and agricultural purposes play significant roles in residents' WTP for protect wetland. Thus, higher educated households was found to have a positive response on willingness to pay for protect wetlands in the country. On the other hand, households who were used wetland for agricultural purposes have a negative response on willingness to pay for wetland protect practices.Publication Embargo Exploring the growth direction: the impact of exchange rate and purchasing managers index on economic growth in Sri Lanka(Springer, 2022-07-22) Jayathilaka, R; Rathnayake, R; Jayathilake, B; Dharmasena, T; Bodinayake, D; Kathriarachchi, DNumerous studies have been conducted, globally and locally, on the impact of the exchange rate on economic growth. In the local context, only a handful of research have investigated this area of study to determine the extent to which the Purchasing Managers’ Index infuence economic growth with the exchange rate, with limited research have been performed in Sri Lanka. This study explores the impact of exchange rate and Purchasing Managers’ Index on economic growth. Consequently, adopting an applied research methodology, the present study was based on secondary data published quarterly by the Central Bank of Sri Lanka reports and the Department of Census and Statistics of Sri Lanka from 2015 to 2021. The Vector autoregression model and Granger Causality Wald test were performed in this study. The empirical fndings highlighted that economic growth and Purchasing Managers’ Index have a signifcant negative impact on the economic growth, while the exchange rate had a signifcant positive impact on the economic growth. Furthermore, the exchange rate and the Purchasing Managers’ Index did not help to predict the exchange rate. The implications of the study demonstrate the relevance of the exchange rate and manufacturing Purchasing Managers’ Index as indicators of changes in overall economic growth activities at the macro level. The fndings will assist the Sri Lankan Government, policymakers, and foreign investors for efective decision making.Publication Open Access Alcohol brings burdens: A global and continent wise study on alcohol consumption and global burden of diseases(researchgate.net, 2022-07) Jayathilaka, R; Athukorala, o; Ishara, S; Silva, D; Pathirageid, TThis article investigates alcohol consumption attributable burden of diseases. The present study considers the overall effect of Human Development Index (HDI), Socio Demographic Index (SDI) and Gross Domestic Product (GDP) for income to measure how these variables impact Global Burden of Diseases (GDB), bringing a different perspective to the results. Data from over 177 countries mainly including European, Asian, North American, South American, African and Australian regions were analysed from 2000 to 2019. A Panel regression technique was applied, and Fixed Effects (FE) and Random Effects (RE) estimations were chosen to derive outcomes of the Hausman test. The findings reflected that alcohol consumption (wine, beer, spirit and other alcohol) has a positive significant relationship with the Global Burden of Diseases (GBD) globally and in the African continent excluding North America and South America. Human Development Index (HDI) have a negative impact on GBD on all countries. Particularly HDI have a negative impact on GBD in African continent except other continents. Also, in the African continent and globally, GBD has a significant positive and in Europe, a significant negative impact on the Socio Demographic Index (SDI). The findings demonstrate the overall picture of the impact of alcohol consumption and other variables on GBD and provide suggestions on how these variables should be tackled in the future to reduce GBD. This is the initial empirical study that investigates the impact of alcohol consumption, analysing the combined effect of HDI, SDI and income on the GBD of continent wise and globally.Publication Open Access Identification of the Poor in Sri Lanka: Development of Composite Indicator and Regional Poverty Lines(researchgate.net, 2006-03) Siddhisena, p; Jayathilaka, RThe identification of the poor and the definition of poverty is rather complex since poverty dimensions are multifaceted. Poverty is not just an inadequacy of income to meet basic needs or the inability to spend. It is largely associated with numerous demographic, socio-economic, cultural, environmental, health and psychological factors. The aim of this study is therefore to compute a composite indicator of multidimensional poverty and regional poverty lines to identify the severity of poverty and regional disparities of poverty. The study was based on the two data sets and the main objectives of the study are: Identification of the poor by using a broader definition of poverty; Measurement of regional differences on poverty using the poverty indices and constructed poverty lines; and Development of a Composite Indicator of Multidimensional Poverty to identify poverty by severity and also to examine regional disparities of poverty.