STATA 11 for Windows SAMPLE SESSION - Food Security Group ...

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Stata 11 Sample Session Annex I I– Survey Instrument hh animcode num 206 331 70 217 331 65 217 335 8 221 330 1200 221 331 200 The above file could have been organized such that each household has only one line of information, and the three animal types appear as three different variables. Such a file would be the wide form of the data. The file as it is organized now is the long form of the data. The following reshape command converts the file from long to wide form such that each animal code is now a variable, and the file becomes a household-level file. . reshape wide num, i (hh) j (animcode) . list, nol nod noo hh num330 num331 num335 206 . 70 . 217 . 65 8 221 1200 200 . When followed by this next command, the file is re-converted from wide to long. But note that the file has become rectangularized, that is, the three animal codes now appear for each household. . reshape long num, i (hh) j (animcode) . list, nol nod noo hh animcode num 206 330 . 206 331 70 206 335 . 217 330 . 217 331 65 217 335 8 221 330 1200 221 331 200 221 335 . The command fillin would have also generated the same rectangularized file as in the preceding example. Do-file suggested commands to place at the beginning of a do-file to set the parameters before starting to work: 1. Commands in a do-file may be delimited by a carriage return or a semi-colon. To set the semi-colon as the delimiter, the command is: #delimit ; This command will only work in a do-file. The delimiter cannot be changed from the console. If you wish to revert back to the carriage return as the delimiter, the command is: #delimit cr 2. The next command will clear the memory: clear all; 3. There are several “set” commands that are useful to put at the beginning of the do-file as well. set memory 70000; (sets the size of memory) set matsize 100 ; (limits number of variables that can be specified in an estimation command) 116
Stata 11 Sample Session Annex I I– Survey Instrument ANNEX II - Questionnaire Socio-Economic Survey of Family Sector Farms in the Province of Nampula (Angoche, Monapo e Ribaúe) July/August 1991 Departamento de Preços e Mercados Food Security Project Name of Household Head ____________________________________________ Household Number ______________________________________________ HH Aldeia __________________________________________________________ VIL Distrito ________________________________________________________ DIST (Subset of questions from original questionnaire) Filename: c-hh.dta I. HOUSEHOLD CHARACTERÍSTICS H1 1. How many persons are in this household? H4 4. Has your family always lived in this village? 1=yes 2=no H8 8. Is your family registered as "deslocada"? 1=yes 2=no H19 19. Do you presently have lands in fallow? 1=yes 2=no H21 21. What is the total area of these fallowed parcels? (hectares) H24 24. Do you have lands that you have completely abandoned? 1=yes --> question 25 2=no --> question 27 H25 25. What is the total area of these abandoned lands? (hectares) H26 26. What was the principal motive for abandoning these lands? 1=no security 2=lands lost fertility 3=lack of labor 4=insect attacks 5=other [We would like to ask you about the food crops you grow.] H29 29. Over the last five years, have you increased or decreased the amount of land in food crops? 1=increased 2=decreased 3=no change H31 31. During a normal year, is your farm production sufficient to feed your entire family? 1=yes 2=no 117
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STATA 11 for Windows SAMPLE SESSION - Food Security Group ...

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