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(String Matching Algorithms,An Applicatione ti ISAE and ISTAT Firms's Registers)

Author

Listed:
  • Emma De Angelis

    (ISAE - Institute for Studies and Economic Analyses)

  • Carmine Pappalardo

Abstract

The aim of the paper is to develop algorithms for the matching of strings from two different registers of Italian enterprises. This makes effective the possibility of integrating the firm-level information collected by ISAE (Institute for Studies and Economic Analyses) with the one gathered by the Italian NSI. The name of the company is the reference information used for string matching. The first procedure is based on a backward recursive application of the critical factorization method. In the second algorithm, a shifting rule is defined based on the positions of blanks within the reference text T. About 80% of the units in ISAE register of business enterprises have been exactly matched. This suggests that the role of firms’ demography should be adequately taken into account to get satisfactory results and confirms the reliability of the proposed algorithms. Some structural characteristics of ISAE sampled firms can be now accounted for.

Suggested Citation

  • Emma De Angelis & Carmine Pappalardo, 2009. "(String Matching Algorithms,An Applicatione ti ISAE and ISTAT Firms's Registers)," ISAE Working Papers 115, ISTAT - Italian National Institute of Statistics - (Rome, ITALY).
    • Handle: RePEc:isa:wpaper:115
    as

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    File URL: http://lipari.istat.it/digibib/Working_Papers/WP_115_2009_DeAngelis_Pappalardo.pdf
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    References listed on IDEAS

    as
    1. Malgarini, Marco & Margani, Patrizia & Martelli, Bianca Maria, 2005. "Re-engineering the ISAE manufacturing survey," MPRA Paper 42440, University Library of Munich, Germany.
    2. Jovanovic, Boyan, 1982. "Selection and the Evolution of Industry," Econometrica, Econometric Society, vol. 50(3), pages 649-670, May.
    3. repec:bla:jindec:v:46:y:1998:i:4:p:453-88 is not listed on IDEAS
    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    String matching algorithms; critical factorization method; shifting rule; firms' registers; firms’ demography.;
    All these keywords.

    JEL classification:

    • C81 - Mathematical and Quantitative Methods - - Data Collection and Data Estimation Methodology; Computer Programs - - - Methodology for Collecting, Estimating, and Organizing Microeconomic Data; Data Access
    • C87 - Mathematical and Quantitative Methods - - Data Collection and Data Estimation Methodology; Computer Programs - - - Econometric Software
    • L60 - Industrial Organization - - Industry Studies: Manufacturing - - - General

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