Medicaid enrollment resulted in improvements in physical and mental health, but had no statistically significant effect on mortality risk.

FORBES: States Face a "Sophie's Choice" on Medicaid Expansion

As I discussed in March, the most recent set of studies by economists indicates that hospital mergers have no effect on the quality of care, but do have a significant effect on the price that hospitals charge.

FORBES: Goal of the NYU-Continuum Hospital Mega-Merger: Raising Prices

But although the drug had a significant impact on symptoms, it has no clear effect on mortality.

FORBES: Magazine Article

Working with the geneticists' favourite animal, the fruit fly Drosophila, Dr Gibson has pinpointed a series of so-called cryptic variations that have no effect on a protein's structure, but can nevertheless, if the circumstances are right, have a significant effect on the individual they belong to.

ECONOMIST: Genetics gets more complicated