Financial integration has greatly contributed to economic growth and development around the globe, in particular for developing countries. However, this process of financial integration has also provided threats in the form of instability which threaten the progress of economic growth and development. The objective of this study is to examine a set of indicators which are valid and indicative of financial instability in the case of developing countries. A panel data of 17 developing countries during the period 2000–2017 is utilized. The credit growth is used as a proxy of financial instability. Standard methods such as the pooled OLS, fixed effect model and random effect model are considered to ensure robustness. Empirical findings from this study indicate that the key determinants of financial instability in developing countries including Vietnam include the GDP growth rate, inflation rate, the growth rate of base money, the change in foreign exchange reserves, lending interest rate, returns in the stock market and the return on equity ratio of the banking sector. Findings from this study appear to support the views of Post-Keynesians in relation to the mechanism leading to financial instability, in particular for developing markets.

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This paper explores optimal tank size for domestic rainwater harvesting systems in Asian tropical climates. A total of 128 locations in Vietnam covering three regional climate patterns were selected for the study. The system behavior was simulated on a daily basis using between 27 and 32 years of rainfall data. Annual water cost was investigated to determine optimal tank size. The relationship among optimal size, climate and system conditions was also analyzed. Results of the study emphasize the economic benefit of rainwater harvesting for the whole study area. The optimal tank size for a non-potable rainwater harvesting system has a range of 1.2-2.6 m 3 , exhibiting 19-65% supply efficiency and a payback period of 7-17 years. Extended system scenarios reveal a contrast in the influences of demand and roof area on optimal size in relation to rainfall amount. The roof area is critical in determining optimal size in the low rainfall area while the demand is important in the high rainfall area. Although there is a certain degree of variability in optimal tank size, it does not considerably undermine the economic benefit of a rainwater harvesting system.

Beta is considered an important measure of systematic risk which is arguably present in an emerging market. Daily data for 2200 Australian listed firms is collected for the January 2007–December 2016 period. Various portfolios are considered. Days with announcements (the a-day) related to crucial macroeconomic news are allocated into the group which is separated from the n-day (nonannouncement days) group. Findings indicate that beta is negatively related to daily expected excess returns in the announcement days in comparison with the nonannouncement days. It is the claim of this paper that portfolio formations do matter when empirical studies on asset pricing are conducted.