The biggest factor propelling change may be the speed of technology.
Samsung, whose shares make up about 20percentt of the equity traded on the Korea Stock Exchange, has been the single biggest factor propelling the exchange's index above the 700 level this month after it dipped into the 500's earlier this year.
Indeed, many of today's transit workers say that a major factor propelling them toward a strike is psychological -- the feeling that neither Mayor Michael R. Bloomberg nor Gov. George E. Pataki nor the Metropolitan Transportation Authority has treated them with the respect they deserve.
The changes to be introduced next week are unlikely to address what has emerged as a potent factor propelling a wave of foreclosures: the roughly 15 million borrowers who are said to be underwater, meaning that they owe more than their homes are worth.
Social media are also a major factor propelling the success of black programming.
Within the United States, the so called "drug war" has been a significant factor propelling the growth of our grossly outsized prison population -- with many people serving lengthy sentences for relatively minor crimes.
But nationally investments in these programs have come in fits and starts, propelled by factors like the cluster of controversies over patient dumping in 2007, implementation of the Affordable Care Act penalties to prevent hospital readmission within 30 days in 2013, and Medicaid expansion, which opened up a new source of funding in states that chose to participate in 2014.
Overall, it seems that policies to roll out ART in poor countries have been propelled by factors other than cost effectiveness considerations, and in spite of perceptions that treatment is often not cost effective.
The "patterns indicate that the factors propelling earlier increases in the returns to higher education have dissipated," Valletta wrote.
Vastly increased quality of audio and video are two of the factors propelling this new format, which is challenging the dominance of the videocassette.
