There is broad agreement among the most prominent observational studies that tenure insecurity deters investment. We present new experimental evidence testing this proposition: a land certification program randomized across villages in Zambia. Our results contradict consensus. Though intervention improved perceptions of security, it had no impact on investment following season. The still zero e...

BACKGROUND Periodontal infections are hypothesized to increase the risk of adverse systemic outcomes through inflammatory mechanisms. The magnitude of effect, if any, of anti-infective periodontal treatment on systemic inflammation is unknown, as are the patient populations most likely to benefit. We conducted a systematic review and meta-analysis of randomized controlled trials (RCTs) to test ...

BACKGROUND The ActivityStat hypothesis suggests that when physical activity is increased or decreased in one domain, there will be a compensatory change in another domain, in order to maintain an overall stable level of physical activity or energy expenditure over time. The ActivityStat debate is gaining momentum in the literature and most of the research to date is based on observational studi...

Multiple sclerosis (MS) is an inflammatory demyelinating disease of the central nervous system (CNS). Riboflavin plays an important role in myelin formation, and its deficiency is implicated as a risk factor for multiple sclerosis. Here, we systematically reviewed the literature concerning the health benefits of riboflavin on MS. The literature recorded within four main databases, including rel...

A series of 8 new complexes of titanium and zirconium with diamido ligands bearing an ethylene and propylene bridge between the two amido groups were synthesized and tested for ethylene polymerization. Titanium complexes bearing an ethylene bridge between the two amido groups showed higher activities than the derivatives with a propylene bridge. In the case of the zirconium complexes, the p...

Sir Ronald Fisher, the statistician, eugenicist, evolutionary biologist, geneticist, and father of modern experimental design, observed that experiments are ‘only experience carefully planned in advance, and designed to form a secure basis of new knowledge’ (Fisher, 1935: 8). Experiments are characterized by the: (1) manipulation of one or more independent variables; (2) use of controls such as...

Continuing high global maternal mortality and morbidity rates in developing countries have resulted in an increasing push to improve reproductive health services for women. Seeking innovative ways for assessing how positive health knowledge and behaviors spread to this vulnerable population has increased the use of social network theories and analysis in health promotion research. Despite the i...