Data store

Although a lot of data are available on web but it is not easy to download them for use. Following are the problems to get data from web.

1. Most of the data is archived and can be searched through search engine (at site) only.
2. Some data is without proper document to understand nature of data.
3. File may not be available in desired format.
4. Resolve proprietary issues. Due to this reason at same site there may be data with different access control.
5. It is difficult to judge size of data.

Keeping these problems in mind one can visit following sites for data search:

1. IQSS Dataverse Network: The Institute of Quantitative Social Science (IQSS) is a virtual archive where one can store, permanently preserve, distribute, and generally or selectively share data or list data from other dataverses. It insure that data user properly site owner of data. It is wide network for data (quantitative, qualitative, report). Anyone can create own dataverse easily. In its network . The Henry A. Murray Research Archive (very large data archive) also belongs to its network. One can store as well as retrieve others data from this site also. Detail information about working of IQSS datavers is available at different site.

2. Inter University Consortium for Political and Social Research (ICPSR): ICPSR provides training in data access, and methods of analysis for a diverse and expanding social science research community. Site address will be changed in mid august.  ICPSR provides network of many data banks like Terrorism & Preparedness Data Resource Center (TPDRC). TPDRC archives and distributes data collected by government agencies, non-governmental organizations (NGOs), and researchers about the nature of intra- (domestic) and international terrorism incidents, organizations, perpetrators, and victims; governmental and nongovernmental responses to terror and citizen's attitudes towards terrorism, terror incidents, and the response to terror.

3. The United Nations Statistics Division:   UNdata provides links for data which may be obtained through different international/national agencies. Through wiki page it gives information about each of UNdata's sources and also includes links to the sources' home pages and databases, contact links, descriptions of the methodology used, and glossaries of terms, when available.

4. Minnesota Population Center is source of census related demographic data. On its site one can found many projects related with data archives. Integrated Public Use Microdata Series is one of them. IPUMS-International is a project dedicated to collecting and distributing census data from around the world. It collect and preserve data and documentation, harmonize data and disseminate data freely. For getting data one should apply for registration and it may take time for approval. One can visit site as guest and can know how system works. Major limitation of data is that it is composed entirely of individual person and household records from population censuses. There are no macroeconomic, business, or aggregate statistics.

5. Time Series Data Library: This is a collection of about 800 time series drawn from many different fields.

6. DASL (Data And Story Library) is an online library of data files and stories that illustrate the use of basic statistics methods. Stories are abstracts that discuss the statistical concepts of a particular data file. It contains data from a wide variety of topics so that statistics teachers can find real-world examples that will be interesting to their students.

7. University of Michigan Document Center: Link of data arranged in different categoris. 

8. American Statistical Association: It provides data which may be useful for teaching. For each data file .dat there is story file .txt which explain how data should be interpreted in corresponding .dat file. 

9. Dataset prepared by A.P.Gore, S.A.Paranjpe, M.B.Kulkarni of Pune University.  Description and covering note of data explain data in nice way. This dataset is more useful practical classes at (university level).