Did mass privatisation really increase post-communist male mortality?

A recent article in the Lancet, by David Stuckler, Larry King and Martin McKee, investigated anew the fluctuations in adult male mortality rates that have come to characterise the so-called post-communist mortality crisis. Adopting a cross-country, time-series perspective the authors examined how the economic policy strategies of the 1990s impacted upon observed fluctuations in mortality. They conclude that the adoption of a strategy of rapid (mass) privatisation contributed to the adverse mortality trends. We subject that finding to closer scrutiny using the same data from which the Stuckler et al claim stems. We find that their claim that mass privatisation adversely affected male mortality trends in the post-Communist world does not stand up to closer examination. It is not supported empirically and is at odds with what we know about both transition in the post-communist world and about health trends over time in this region.

Three-port DC-DC converter for stand-alone photovoltaic systems

System efficiency and cost effectiveness are of critical importance for photovoltaic (PV) systems. This paper addresses the two issues by developing a novel three-port dc-dc converter for stand-alone PV systems, based on an improved Flyback-Forward topology. It provides a compact single-unit solution with a combined feature of optimized maximum power point tracking (MPPT), high step-up ratio, galvanic isolation, and multiple operating modes for domestic and aerospace applications. A theoretical analysis is conducted to analyze the operating modes followed by simulation and experimental work. This paper is focused on a comprehensive modulation strategy utilizing both PWM and phase-shifted control that satisfies the requirement of PV power systems to achieve MPPT and output voltage regulation. A 250-W converter was designed and prototyped to provide experimental verification in term of system integration and high conversion efficiency.