While several rat studies indicate that alcohol is more toxic during adolescence than adulthood, some researchers believe that it remains unclear whether this is also the case in humans. Though heavy binge drinking adolescent humans show impaired brain activity during memory tests and underdeveloped brain structures compared to adolescents who did not binge-drink, they argue that these findings are similar to adult alcoholics who did not abuse alcohol during adolescence.  Extrapolation from animal studies to humans is notoriously difficult,  and a review by the group Choose Responsibility concluded that alcohol's long-term damage to cognitive processes was the same regardless of whether heavy drinking commenced during adolescence or later. 
Following a brief pause after the economic crisis, health expenditure is rising again in most OECD countries. Yet, a considerable part of this health expenditure makes little or no contribution to improving people's health. In some cases, it even results in worse health outcomes. Countries could potentially spend significantly less on health care with no impact on health system performance, or on health outcomes. This report systematically reviews strategies put in place by countries to limit ineffective spending and waste. On the clinical front, preventable errors and low-value care are discussed. The operational waste discussion reviews strategies to obtain lower prices for medical goods and to better target the use of expensive inputs. Finally, the report reviews countries experiences in containing administrative costs and integrity violations in health.
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