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help: spcs2xt                                                        dialog: sp
> cs2xt
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        +-------+
    ----+ Title +------------------------------------------------------------

 spcs2xt: Convert Squared Cross Section to Panel Spatial Weight Matrix


        +--------+
    ----+ Syntax +-----------------------------------------------------------

 spcs2xt varlist , panel(numlist) time(numlist) matrix(new_panel_weight_file)


        +-------------+
    ----+ Description +------------------------------------------------------

  spcs2xt creates or generates squared panel spatial weight matrix and file
  among neighbor locations, from squared Cross Section weight matrix, that
  already exists in stata dta file, for using in panel spatial regression
  analysis.


        +---------+
    ----+ Options +----------------------------------------------------------

  time: Number of time series in each cross section (must be balanced).

  matrix: Specify name of new panel spatial weight matrix file as stata dta
  file, that will be created.


        +----------+
    ----+ Examples +---------------------------------------------------------

        clear all

        use spcs2xt.dta, clear

        db spcs2xt

        spcs2xt v1 v2 v3 v4, time(4) matrix(W)

OR USE

        spcs2xt v*, time(4) matrix(W)

        mat list W

        mat list Wxt

  The final shape of cross section and panel spatial weight matrix will be as
  follows:.


  --------------------------
  |   1      2      3      4
  |-------------------------
  |   0      1      1      1
  |   1      0      1      0
  |   1      1      0      1
  |   1      0      1      0
  |-------------------------

            (1)               (2)               (3)               (4)         
    |-----------------|-----------------|-----------------|-----------------|
(1) |  0   0   0   0  |  1   0   0   0  |  1   0   0   0  |  1   0   0   0  |
    |  0   0   0   0  |  0   1   0   0  |  0   1   0   0  |  0   1   0   0  |
    |  0   0   0   0  |  0   0   1   0  |  0   0   1   0  |  0   0   1   0  |
    |  0   0   0   0  |  0   0   0   1  |  0   0   0   1  |  0   0   0   1  |
    |-----------------|-----------------|-----------------|-----------------|
(2) |  1   0   0   0  |  0   0   0   0  |  1   0   0   0  |  0   0   0   0  |
    |  0   1   0   0  |  0   0   0   0  |  0   1   0   0  |  0   0   0   0  |
    |  0   0   1   0  |  0   0   0   0  |  0   0   1   0  |  0   0   0   0  |
    |  0   0   0   1  |  0   0   0   0  |  0   0   0   1  |  0   0   0   0  |
    |-----------------|-----------------|-----------------|-----------------|
(3) |  1   0   0   0  |  1   0   0   0  |  0   0   0   0  |  1   0   0   0  |
    |  0   1   0   0  |  0   1   0   0  |  0   0   0   0  |  0   1   0   0  |
    |  0   0   1   0  |  0   0   1   0  |  0   0   0   0  |  0   0   1   0  |
    |  0   0   0   1  |  0   0   0   1  |  0   0   0   0  |  0   0   0   1  |
    |-----------------|-----------------|-----------------|-----------------|
(4) |  1   0   0   0  |  0   0   0   0  |  1   0   0   0  |  0   0   0   0  |
    |  0   1   0   0  |  0   0   0   0  |  0   1   0   0  |  0   0   0   0  |
    |  0   0   1   0  |  0   0   0   0  |  0   0   1   0  |  0   0   0   0  |
    |  0   0   0   1  |  0   0   0   0  |  0   0   0   1  |  0   0   0   0  |
    |-----------------|-----------------|-----------------|------------------


  After creating panel spatial weight matrix, you can use spautoreg (if
  installed) to generate eigenvalues vector and standardized weight matrix.


        +--------+
    ----+ Author +-----------------------------------------------------------

  Emad Abd Elmessih Shehata
  Assistant Professor
  Agricultural Research Center - Agricultural Economics Research Institute - Eg
> ypt
  Email:   emadstat@hotmail.com
  WebPage:                http://emadstat.110mb.com/stata.htm
  WebPage at IDEAS:       http://ideas.repec.org/f/psh494.html
  WebPage at EconPapers:  http://econpapers.repec.org/RAS/psh494.htm


        +------------------+
    ----+ spcs2xt Citation +-------------------------------------------------

    Shehata, Emad Abd Elmessih (2011)
    "SPCS2XT: Stata Module to Convert Squared Cross Section to Panel Spatial
        Weight Matrix"

        http://ideas.repec.org/c/boc/bocode/s457348.html

        http://econpapers.repec.org/software/bocbocode/s457348.htm


Also see

    Online: spautoreg, spautoregxt, spweight, spweightxt, spreg, spivreg, 
            ivreg2, spwmat, spcs2xt, (if installed).