Source: U.S. Department of Labor  

Release: Minimum Wage Rates  

Units:  Dollars per Hour, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

The federal minimum wage is the minimum hourly wage employers are required to pay employees who are eligible under the Fair Labor Standards Act (FLSA) of 1938. The FLSA was generally only applicable to employees involved in interstate commerce, either directly or through the creation of goods. Many amendments have since been added to the FLSA, expanding its coverage and raising the minimum wage. Significant amendments occurred in 1961 and in 1966, when a separate minimum wage for farm workers was established. Starting in January of 1978 the minimum wages of all eligible workers, including farm workers, were made uniform. The values in the series for non-farm workers are those for the groups initially covered under the 1938 FLSA. Many states also have minimum wage laws. Some state laws provide greater employee protections; employers must comply with both.

For additional information go to: http://www.dol.gov/whd/minwage/coverage.htm or http://www.dol.gov/whd/minwage/chart.htm#fn3

Source: U.S. Bureau of Labor Statistics  

Release: Consumer Price Index  

Units:  Index 1982-1984=100, Seasonally Adjusted

Frequency:  Monthly

Notes:

The Consumer Price Index for All Urban Consumers: All Items (CPIAUCSL) is a price index of a basket of goods and services paid by urban consumers. Percent changes in the price index measure the inflation rate between any two time periods. The most common inflation metric is the percent change from one year ago. It can also represent the buying habits of urban consumers. This particular index includes roughly 88 percent of the total population, accounting for wage earners, clerical workers, technical workers, self-employed, short-term workers, unemployed, retirees, and those not in the labor force.

The CPIs are based on prices for food, clothing, shelter, and fuels; transportation fares; service fees (e.g., water and sewer service); and sales taxes. Prices are collected monthly from about 4,000 housing units and approximately 26,000 retail establishments across 87 urban areas. To calculate the index, price changes are averaged with weights representing their importance in the spending of the particular group. The index measures price changes (as a percent change) from a predetermined reference date. In addition to the original unadjusted index distributed, the Bureau of Labor Statistics also releases a seasonally adjusted index. The unadjusted series reflects all factors that may influence a change in prices. However, it can be very useful to look at the seasonally adjusted CPI, which removes the effects of seasonal changes, such as weather, school year, production cycles, and holidays.

The CPI can be used to recognize periods of inflation and deflation. Significant increases in the CPI within a short time frame might indicate a period of inflation, and significant decreases in CPI within a short time frame might indicate a period of deflation. However, because the CPI includes volatile food and oil prices, it might not be a reliable measure of inflationary and deflationary periods. For a more accurate detection, the core CPI (CPILFESL) is often used. When using the CPI, please note that it is not applicable to all consumers and should not be used to determine relative living costs. Additionally, the CPI is a statistical measure vulnerable to sampling error since it is based on a sample of prices and not the complete average.

For more information on the consumer price indexes, see:
Bureau of Economic Analysis. "CPI Detailed Report." 2013.
Handbook of Methods
Understanding the CPI: Frequently Asked Questions