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    Contact us

    Survey Design and Analysis Services is now under new management.

    New contact details:

    David and Natalie White

    Phone: +61 2 6166 2982

    Email: sales@surveydesign.com.au

    Address: P.O.Box 5044, Lyneham, ACT 2602, Australia

    Please visit our new website which will be launched in just a few days

    Stata is a comprehensive statistical package for researchers of all disciplines.
    Longitudinal/Panel Data
    Multivariate Methods
    Survey Data
    Survival Analysis
    Multiple Imputation
    Structural Equation Modelling

    Statistics useful across other fields

    In addition, Stata produces publication-quality graphics, contains extensive data-management capabilities, and has a powerful matrix-programming language.

    What's New in Stata 13?

    Longer strings, even BLOBs (Binary Large OBjects) Treatment-effect estimators Generalized SEM

    • The maximum length of string variables increases from 244 to 2 billion characters.
    And More: Click here
    Treatment-effect estimators measure the causal effect of treatment on an outcome in observational data.
    • Multilevel & multivalued treatments
    • Average treatment effects (ATEs)
    • ATEs on the treated (ATETs)
    • Potential-outcome means (POMs)
    • Continuous, binary, and count outcomes
    And More: Click here
    Youtube - Click here
    Generalized linear responses:
    • Continuous -- linear, log-gamma
    • Binary -- probit, logit, complementary log-log
    • Count -- Poisson, negative binomial
    • Categorical -- multinomial logit
    • Ordered -- ordered logit, ordered probit
    Multilevel/hierarchical data
    • Nested: 2 levels, 3 levels, more levels
    • Crossed
    • Latent variables at different levels
    • Random intercepts
    • Random slopes (paths)
    • Mixed models
    And More: Click here
    Youtube-Click here
    Youtube-Click here
    New time series features - Forcast Power and sample size

    The new -forecast- command lets you combine results from multiple Stata estimation commands and/or other sources to produce dynamic or static forecasts and forecast intervals.
    • Time-series and panel datasets
    • Multiple estimation results
      . VARs, VECs, ARIMAs, ARCHs, 3SLS, more
      . estimated with Stata or
      . obtained from outside sources
      . one equation or thousands
    • Identities
    • Add factors and other adjustments
    • Dynamic or static (one ahead) forecasts
    And More: Click here
    Youtube - Click here


    Solve for:
    New and extended random-effects panel-data estimators Effects sizes More

    • New and extended random-effects panel-data estimators
    • New estimators
         Random-effects ordered probit
         Random-effects ordered logit
    And More: Click here

    • Comparison of means
      . Cohen's d
      . Hedges's g
      . Glass's Delta
      . Point/biserial correlation
      . Estimated from data or published summary statistics
    And More: Click here

    • More multilevel mixed-effects models
    • Project Manager
    • Java plugins

    Go here for a comprehensive overview of what's new in Stata 13.
    Go here for greater details on what's new in Stata 13.
    Go here to find out more about the capabilities of Stata 13.

    Stata/MP 13 is a version of Stata/SE that runs on multiprocessor computers, thus significantly reducing the time required to run your analysis. Stata/MP provides the most extensive support for multiple-processor computers and dual-core computers of any statistics and data-management package. Stata/MP can run on computers with 2,4,6,8,16,32 & 64 processors; with the appropriate licence.
    Go here for a comprehensive overview of Stata/MP 13.
    Stat/Transfer 12
    Now available
    Stata/Transfer is a program that facilitates the changing of file formats eg. a SPSS data file can be converted to a Stata data file
    Go here for details of Stat/Transfer 12.

    Recent  Releases

    Statistics with Stata: Version 12, Eighth Edition 
    Lawrence C. Hamilton
    Price: $88 + Postage*
    More details Details
    (In stock)

    Stata Journal The Stata Journal publishes articles, columns, and book reviews of interest to Stata users from beginners to Stata experts.
    To see the table of contents for Stata Journal Volume 14 Issue 2 (latest issue) go here
    Stata News
    Stata News is a quarterly publication The Stata News consists of important announcements about new products, upcoming releases, course dates, NetCourse information, and more. Go here to see the electronic version of the Stata News.
    For books on Statistics and to help you learn Stata go here.

    Stata Tip

    Word Frequency with infile

    Sometimes it is interesting to look a text in terms of frequency. This tip uses some text from the Stata Getting Started Manual and produces the following:

    (1) example 1 produces a list of single word frequency
    (2) example 2 produces a list of two consecutive words freqency

    Example data

    set more off
    cd c:/
    input str500 words
    "Introducing Stata"
    "This chapter will run through a sample work session, introducing you to a few of the basic tasks"
    "that can be done in Stata, such as opening a dataset, investigating the contents of the" 
    "dataset, using some descriptive statistics, making some graphs, and doing a simple"
    "regression analysis. As you would expect, we will only brush the surface of many of these" 
    "topics. This approach should give you a sample of what Stata can do and how Stata works." 
    "There will be brief explanations along the way,with references to chapters later in this book" 
    "as well as to the system help and other Stata manuals.We will run through the session"
    "by using both menus and dialogs and Stata’s commands so that you can become" 
    "familiar with them both. Take a seat at your computer, put on some good"
    "music, and work along with the book."
    outfile using text.txt, replace noquote

    Example 1
    infile str100 a using text.txt, clear
    //removing punctuation in example
    replace a=subinstr(a,"."," ",10)
    replace a=subinstr(a,";"," ",10)
    replace a=subinstr(a,","," ",10)
    //lower case
    replace a=trim(lower(a))
    outfile using text1.txt, replace noquote  //to be used in example 2 below
    contract a
    sort _freq
    list ,sepby(_freq)

    The result
     66. |       through       2 |
     67. |          both       2 |
     68. |         along       2 |
     69. |            we       2 |
     70. |          book       2 |
     71. |       session       2 |
     72. |       dataset       2 |
     73. |            be       2 |
     74. |   introducing       2 |
     75. |            in       2 |
     76. |          that       2 |
     77. |           run       2 |
     78. |        sample       2 |
     79. |          this       3 |
     80. |          some       3 |
     81. |           can       3 |
     82. |            to       3 |
     83. |          with       3 |
     84. |           you       4 |
     85. |          will       4 |
     86. |            as       4 |
     87. |            of       5 |
     88. |         stata       5 |
     89. |           and       6 |
     90. |             a       6 |
     91. |           the       8 |

    Example 2 - Two consecutive words freqency
    There are 2 cases:
    A word in front of the current observation
    A word behind the current observation

    infile str100( a  b ) using text1.txt, clear //file from example 1
    save doublea, replace
    use single, clear
    drop in 1
    outfile using text2.txt, replace noquote
    infile str100( a  b ) using text2.txt, clear
    append using doublea
    contract a b
    sort _freq a
    list ,sepby(_freq)

    The result
    134. |         would          expect       1 |
    135. |           you           would       1 |
    136. |           you             can       1 |
    137. |           you               a       1 |
    138. |           you              to       1 |
    139. |          your        computer       1 |
    140. |             a          sample       2 |
    141. |            of             the       2 |
    142. |           run         through       2 |
    143. |            we            will       2 |
    144. |          will             run       2 |

    For further help:
    help input
    help infile
    help outfile
    help replace
    help contract
    help sort

    Contact details
    David and Natalie White,
    Survey Design and Analysis Services Pty Ltd,
    PO Box 5044,
    Lyneham, ACT 2602
    Phone: +61 2 6166 2982
    Mobile. 0457 356 748

    Email: sales@surveydesign.com.au
    ABN 37 051 831 826

    If our office is not attended, please leave your message as well as your phone number or Email address on our answering machine. You can send an email at any time and we will attend to it as soon as we can.

    Survey Design and Analysis Services Pty/Ltd

    Our company is:

    • The Australian & New Zealand distributors for StataCorp. Stata is an integrated suite of software for data management, statistical analysis and graphics, and is available for Windows, Macintosh, and Linux computers. Stata is used by medical researchers, biostatisticians, epidemiologists, economists, sociologists, political scientists, geographers, psychologists, social scientists, and other research professionals needing to handle and analyse data.
    • The Australian & New Zealand distributors for Stat/Transfer (Circle Systems). Stat/Transfer handles the transfer of data between a wide range of data formats.


    'Stata is a registered trademark of StataCorp LP, College Station, TX, USA, and the Stata logo is used with the permission of StataCorp.'