composed of citations to articles in journals, magazines, newspapers, marketing research studies, technical reports, government documents, and the like. They often provide summaries or abstracts of the material cited. numeric databases Numeric databases contain numerical and statistical information that may be important sources of secondary data. full-text databases Databases containing the complete text of secondary source documents comprising the database. directory databases Directory databases provide information on individuals, organizations, and services. Real Research InfoUSA: Here, There, and Everywhere InfoUSA (www.infousa.com) is a leading provider of sales and marketing support data. The company gathers data from multiple sources, including: ᭹ 5,200 Yellow Page and Business White Page directories ᭹ 17 million phone calls to verify information. Every business is called one to four times a year. ᭹ County courthouse and Secretary of State data ᭹ Leading business magazines and newspapers ᭹ Annual reports ᭹ 10Ks and other SEC filings ᭹ New business registrations and incorporations ᭹ Postal service information, including National Change of Address, ZIP+4 carrier route, and Delivery Sequence files The underlying database on which all these products are based contains information on 210 million U.S. consumers and 14 million businesses, as of 2009. The products derived from these databases include sales leads, mailing lists, business directories, mapping products, and also delivery of data on the Internet.19 ▪ Online, Internet, and offline databases may be further classified as bibliographic, numeric, full-text, directory, or special-purpose databases. Bibliographic databases are composed of citations to arti- cles in journals, magazines, newspapers, marketing research studies, technical reports, government documents, and the like.20 They often provide summaries or abstracts of the material cited. Examples of bibliographic databases include ABI/Inform and the Predicasts Terminal System. Another bibliographic database, Management Contents, provided by the Dialog Corporation, was used to enhance the literature search in the department store patronage project. Numeric databases contain numerical and statistical information, such as survey and time- series data. Economic and industry data lend themselves to time-series presentations, which are developed when the same variables are measured over time. Such data are particularly relevant for assessing market potential, making sales forecasts, or setting sales quotas. The American Statistics Index (ASI) provides abstracts and indexes of federal government statistical publications. Global Financial Data (www.globalfinancialdata.com) provides historical data on securities, dividends, and exchange rates. Commercially updated census data are another example of numeric databases. Several sources provide updated, current-year and 5-year projections on population statistics collected in the latest census. A variety of geographic categorization schemes, including census tract, zip code, and Nielsen’s Designated Market Areas or Selling Areas, can be used as keys for searching these databases. Claritas, now know as Nielsen’s Claritas (www.claritas.com), is one firm that provides updated demographic information annually. Full-text databases contain the complete text of the source documents comprising the database. Vu/Text Information Systems, Inc., provides electronic full-text delivery and search capabilities for a number of newspapers (e.g., Washington Post, Boston Globe, Miami Herald). The LexisNexis service provides full-text access to hundreds of business databases, including selected newspapers, periodicals, company annual reports, and investment firm reports. Directory databases provide information on individuals, organizations, and services. Economic Information Systems, Inc., through its database EIS Nonmanufacturing Establish- ments, provides information on location, headquarters, name, percentage of industry sales, industry classification, and employment size class for about 200,000 nonmanufacturing establishments that employ 20 or more people. As another example, the national electronic Yellow Pages directories of manufacturers, wholesalers, retailers, professionals, and service computer data files available on CD-ROM disks. These disks contain detailed information orga- nized by census track or zip code. In the department store patronage project, this type of informa- tion was used in sample selection.18 As indicated by the following example, several vendors are providing data in various forms.