But slowly, the park is starting to show improvements.
So the results show improvements, but not that the project itself contributed to them.
For years, UK air pollution measurements have failed to show improvements in air quality, even as standards have tightened.
When children learn outdoors, studies show improvements in their self-confidence, independence and social skills, better focus, memory and language.
Transgenic plants that are tolerant to herbicides and that show improvements in other qualities also have been developed.
"People were looking for it to show improvements and it did," said Kevin Roe, an analyst at Roe Equity Research.
It is (again) less helpful for employers trying to work out the exam currency exchange rate, and very awkward for headteachers, who are under pressure to show improvements.
So while statistics show improvements to the crunch culture, young fanatics keen to prove their passion can easily slip into destructive modes of working.
At the same time, the governor proposed to spend another $500 million a year to reward teachers whose schools show improvements in student performance.
Ford and G.M. said they had not reduced their forecasts but left open the possibility that they would if April and May do not show improvements.
Studies show improvements in balance, strength, gait, muscular power, blood pressure, endurance and bone density as a result of regular physical activity in older age.
