That is why increases in government subsidies to ultra-orthodox communities in Israel have sharply increased the duration of yeshiva attendance.

ECONOMIST: Letters | The

Others focus on technical shifts in the demand for bonds, such as pension funds' increased desire for longer-duration assets.

ECONOMIST: Europe's and America's economies

It is believed that retrofitting existing plants for PRB coal, which are originally designed to consume Appalachian coal is not cost intensive and those expenses can be easily recouped in short duration by the increased profits from operations with PRB coal.

FORBES: Union Pacific's Coal Freight Business Chugs Ahead After Slowdown

Taking the US as an example data from the Bureau of Labor Statistics reveals that the duration of unemployment in the US has increased from 7 weeks in 1970, to 12 weeks in 1990 and in 2010 is at 35 weeks.

FORBES: Labor Pains

Long-term DAPT use can lead to additional safety risks, such as increased bleeding events, which is why shorter-term duration of DAPT may be meaningful for patients.

FORBES: Xience Stents Gain European Nod For Three-Month Dual Antiplatelet Therapy

The time required for the FDA to review the data on and approve a new drug--about 18 months--has been essentially unchanged for the past decade, while the duration of clinical testing (largely a function of FDA requirements) has gradually increased.

FORBES: Magazine Article