### rate:

Incidence rate
* allow comparison of disease patterns across different populations.
* are counts of victimization, and therefore more accurately reflect amount of crime.
* is the usual measure of risk and is calculated per week, per year, and so on.

Infection rate
* are highest in areas where sanitation is poor
  - developing countries and in children
* increase as one gets older
  - with age, density, and purity of stands
+ Hepatitis C, Epidemiology: Diseases caused by viruses :: Sexually transmitted diseases :: Liver disease
  * Infection rates are higher in some countries in Africa and Asia.

Inflation rate
* are rates.
* is the percentage rate of change of the price level in the economy.
* testify to the worldwide popularity of wishful thinking.

### rate:

Interest rate
* affect borrowing power
  - economic activity via a number of mechanisms
* are a key determinant of land values, the base of wealth in agriculture
  - essentially the cost of acquiring or borrowing money
  - exs
  - high during periods of inflation
  - insensitive to the money supply, and investment is insensitive to interest rates
  - just one aspect of the economy that can affect stock prices
  - nothing more than a symptom of inflation
  - often volatile over time
  - such that more and more people are able to afford housing
* are the charge for borrowing money lenders use to make a profit
  - manifestation of the demand versus the supply of savings
* are the most basic variable in discussing rates of return on financial investment
  - important factor in the pricing of bonds
  - national weighted average of adjustable and fixed-rate loans
* are the single most important aspect of bank profitability
  - powerful factor affecting the stock market
  - standard against which all investments are measured
* are, by definition, rates of return.
* can and do go up and down every day, just like stock market prices
  - change because of market conditions
* change all the time, though, as the economy changes.
* determine mortgage rates, which have a significant impact on the cost of a home.
* determine the amount of money a bank can earn
  - value of money
* dictate how much home a borrower can buy in many cases.
* function to keep credit and savings in balance.
* have a more fundamental part in the allocation of resources to economic projects
  - powerful effect on measured affordability
  - profound effect on measured affordability
  - substantial impact on housing sale on home buying
  - an impact on unemployment, which in turn influences revenues
* impact heavily the profits of publicly-held corporations.
* increases with the tenure of deposit.
* is interest expressed as a percentage
  - supposed to influence the level of economic activity in the economy
  - the average short-term borrowing rate available to the company
* move with the economic cycle.
* remain linked to the rate of inflation.
* represent the price for borrowing money.
* rise in a growing economy and fall during a depression.
* vary from currency to currency, and they change on a daily basis.

### rate | interest rate:

Base rate
* are interest rates.
* is an interest rate

Literacy rate
* continue to rise and fewer people leave school without qualifications.
* run in the high nineties.

Megahertz
* are a myth.
* denotes a million waves per second.
* is the number of cycles per second.
* million cycles per second.