But because of the pressing need for thousands of large generating stations that emit no carbon dioxide while providing electricity day and night, many technologists keep returning to potential improvements in nuclear power.
And the story in both those professions has not been of brilliant returns to shareholders or vast improvements for society, but of wealth extraction and lobbying politicians, Davos-style.
Our results suggest that maximising the returns to innovation and quality improvement requires consideration of the soft and/or hard nature of individual QIMs and the timing and sequencing of their adoption.
If an extra 4% on a typical school's budget really brings only 5% improvement, the returns to the taxpayer look pretty slim.
It also includes interventions aimed at reducing health care costs, wage replacement costs and other intervention costs in addition to improvements in return to disability duration and work return rates as measured by self-reported return to work dates, total duration of absence and subsequent recurrences, etc.
She repeatedly returned to labour-market improvements: falling unemployment rates and other indicators such as the number of "marginally attached" workers, and those that work part-time but would prefer a full-time job.
The plan would link the rates of return that transmitters can earn to improvements they make to the system.
Much of the recent rise in American inequality can be explained, he writes, by demographic shifts or education, as well as the changing return to high achievement thanks to improvements in communications technologies.
Firm growth in this study refers to improvements in: return on investment, profit margin, sales, market share, revenue and financial position relative to competitors.
Despite this, there was evidence of a system-wide improvement in phase 2, leading to improvements in return of spontaneous circulation (adjusted odds ratio, 1.87; 95% CI, 1.06 3.30; p = 0.03) and process-focused outcomes.
Even without such improvements, however, return on investment advances conventional global and country priority setting approaches by incorporating costs and diminishing returns to provide a dynamic spatial and temporal roadmap for protecting species more efficiently in a rapidly changing world.
