Statistical Terms Glossary

The purpose of a journey is the main reason for a journey. Travel purposes are: Professional/business purpose: business in course of work, trade, employee business, education as part of a position, commuting to a workplace so far away that a place to stay at the destination is needed. Private purpose: all purposes that are not professional.

Travel time: the time spent travelling from the moment of departure from one activity to the moment of arrival at the new activity. The travel time includes the time spent waiting between two consecutive stages. Duration of a journey: the number of nights spent from leaving home until returning home.

Bill issued by U.S. Treasury with short maturity (less than one year).

Government obligation, issued for periods of three to 12 months. T-bills are traded on a discount basis. They are the most liquid form of short-term investment.

A treasury bond is a bond issued by a national government. Treasury bonds normally carry a higher rating than local government or corporate bonds, thereby offering a lower yield

Long-term (more than ten years) fixed coupon paper issued by the Federal Reserve on behalf of the U.S. Treasury.

Form of zero-coupon security first created by Merrill Lynch. They consist of U.S. Government backed bonds that have been stripped of their coupons. See also certificates of accrual on Treasury securities.

A treasury note is an intermediate interest bearing obligation of a national government with a maturity ranging from one to five years

A medium-term (normally from two to ten years) coupon security issued by the U.S. Treasury. In France, bons du Trsor have a maturity of one to five years.

Current account of the U.S. Treasury in which tax receipts and the receipts from the sale of bonds to the public are deposited.

Quantity of treated wastewater which is reused in a given year. Wastewater treatment is the process to render wastewater fit to meet applicable environmental standards for recycling or reuse.

Agreement between countries that is formal, specific, and legally binding. Water resource treaties typically specify minimal amounts of water that upstream countries will provide to downstream countries.

The trend-restored form of the composite leading indicator (CLI) is calculated by multiplying the amplitude-adjusted and ratio-to-trend CLI by the trend of the reference series to obtain the trend restored CLI. This trend-restoration enables direct comparison with the reference series.

A term used in Indian Ocean countries for dried sea cucumbers; a synonym of beche-de-mer