The Consumer Price Index for All Urban Consumers (CPI-U) in the Detroit-Warren-Dearborn area decreased 0.6 percent from October to December, the U.S. Bureau of Labor Statistics reported today. Assistant Commissioner for Regional Operations Charlene Peiffer noted that the index for all items less food and energy fell 0.6 percent while the food index rose 0.8 percent. The energy index declined 2.6 percent over the bi-monthly period. Among the indexes within the all items less food and energy category, prices were lower for apparel and new and used motor vehicles. (Data in this report are not seasonally adjusted. Accordingly, month-to-month changes may reflect the impact of seasonal influences.)

Over the past 12 months, the Detroit all items CPI-U increased 2.5 percent. (See chart 1 and table A.) The index for all items less food and energy increased 1.8 percent and the food index was up 3.3 percent from December 2018 to December 2019. The energy index rose 9.0 percent over the year. (See table 1.)

Food

Food prices were up 0.8 percent from October to December. Of the two components within the food index, prices for food at home (groceries) increased 0.4 percent and prices for food away from home (restaurant, cafeteria, and vending purchases) rose 1.3 percent over the bi-monthly period.

Over the year, food prices in the Detroit area were up 3.3 percent. Prices for groceries increased 2.3 percent and prices for food away from home increased 4.5 percent.

Energy

The energy index for Detroit was down 2.6 percent from October to December. Among the index’s components, prices were lower for gasoline (-2.4 percent), electricity (-3.8 percent), and utility (piped) gas service (-2.0 percent).

From December 2018 to December 2019, overall energy prices increased 9.0 percent. Gasoline prices rose 12.4 percent, while the indexes for electricity and for utility (piped) gas service increased 8.2 percent and 3.2 percent, respectively.

All items less food and energy

The index for all items less food and energy decreased 0.6 percent from October to December. Among the index’s components, prices were lower for apparel (-9.7 percent) and new and used motor vehicles (-1.3 percent).

Over the year, the index for all items less food and energy rose 1.8 percent. Prices were higher for shelter (3.3 percent) and medical care (5.3 percent).

Table A. Detroit-Warren-Dearborn, MI, CPI-U 2-month and 12-month percent changes, all items index, not seasonally adjusted

Month	2015		2016		2017		2018		2019
	2-month	12-month	2-month	12-month	2-month	12-month	2-month	12-month	2-month	12-month
February	-0.7	-1.8	0.3	0.9	0.9	3.0	0.3	2.1	0.4	1.2
April	1.2	-1.9	1.4	1.1	0.7	2.3	0.9	2.3	0.6	1.0
June	0.0	-2.4	1.2	2.3	0.0	1.1	1.3	3.6	0.4	0.1
August	0.6	-0.9	-0.1	1.7	0.1	1.3	-0.6	2.8	0.6	1.4
October	0.1	-0.7	0.2	1.7	0.9	2.0	0.0	1.9	1.0	2.4
December	-1.2	-0.1	-0.6	2.4	0.1	2.7	-0.6	1.2	-0.6	2.5

The February 2020 Consumer Price Index for Detroit is scheduled to be released on Wednesday, March 11, 2020.

Technical Note

The Consumer Price Index (CPI) is a measure of the average change in prices over time in a fixed market basket of goods and services. The Bureau of Labor Statistics publishes CPIs for two population groups: (1) a CPI for All Urban Consumers (CPI-U) which covers approximately 93 percent of the total population and (2) a CPI for Urban Wage Earners and Clerical Workers (CPI-W) which covers approximately 29 percent of the total population. The CPI-U includes, in addition to wage earners and clerical workers, groups such as professional, managerial, and technical workers, the self-employed, short-term workers, the unemployed, and retirees and others not in the labor force.

The CPI is based on prices of food, clothing, shelter, and fuels, transportation fares, charges for doctors' and dentists' services, drugs, and the other goods and services that people buy for day-to-day living. Each month, prices are collected in 75 urban areas across the country from about 5,000 housing units and approximately 22,000 retail establishments--department stores, supermarkets, hospitals, filling stations, and other types of stores and service establishments. All taxes directly associated with the purchase and use of items are included in the index.

The index measures price changes from a designated reference date (1982-84) that equals 100.0. An increase of 16.5 percent, for example, is shown as 116.5. This change can also be expressed in dollars as follows: the price of a base period "market basket" of goods and services in the CPI has risen from $10 in 1982-84 to $11.65. For further details see the CPI home page on the Internet at www.bls.gov/cpi and the BLS Handbook of Methods, Chapter 17, The Consumer Price Index, available on the Internet at www.bls.gov/opub/hom/pdf/homch17.pdf.

In calculating the index, price changes for the various items in each location are averaged together with weights that represent their importance in the spending of the appropriate population group. Local data are then combined to obtain a U.S. city average. Because the sample size of a local area is smaller, the local area index is subject to substantially more sampling and other measurement error than the national index. In addition, local indexes are not adjusted for seasonal influences. As a result, local area indexes show greater volatility than the national index, although their long-term trends are quite similar. Note: Area indexes do not measure differences in the level of prices between cities; they only measure the average change in prices for each area since the base period.

The Detroit-Warren-Dearborn, MI, Core Based Statistical Area covered in this release is comprised of Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe, Oakland, St. Clair, Washtenaw, and Wayne Counties in Michigan.

Information in this release will be made available to sensory impaired individuals upon request. Voice phone: (202) 691-5200; Federal Relay Service: (800) 877-8339.