session 1 introduccion updated

Introduc)on*to*Stata***(1st*Edi)on)*

Aurelio*Tobas*

UB#Economics##University#of#Barcelona#

Barcelona,#January#2014#

h

Course*contents*

1.#Stata#and#its#resources#

2.#Handling#data#sets#3.#Housekeeping# ##4.#Graphics#and#summary#staEsEcs#

5.#StaEsEcal#tests#and#comparison#methods#6.#CorrelaEon#and#linear#regression#7.#Basic#econometrics#

8.#Other#topics#

IntroducEon#to#Stata# 3#

Organisa)on*

Lecturer##Aurelio#Tobias,#BSc#MSc#PhD#CStat##Senior#ScienEst#at#CSIC#and#Part\Eme#lecturer#at#UPF##[email protected]#

#h

Organisa)on*

Course#informaEon#and#materials#(slides,#datasets#and#do#les)#available#at,##h

Session*contents*

General#characterisEcs## Windows,#menus#and#bu

Windows*


Stores the syntax already used

Shows results

Displays variables available in data set

To type Statas syntax Working directory

Menus*


File#menu#mainly#allows#to#open#and#save#data#sets#in#several#ways#(import/export)#

Menus*


Edit#menu#has#the#usual#tasks#to#copy#and#paste,#also#manage#preferences#

Menus*


Data#menu#provides#main#funcEons#for#data#management#

Menus*

13#

Graphics#menu#contains#all#types#of#plots#available#

Menus*


Sta)s)cs#menu#contains#all#the#staEsEcal#procedures#available#for#analyzing#data#

Menus*


Windows#menu#allows#access#to#all#available#windows#in#Stata##

Menus*


Help#menu#provides#access#to#dierent#types#of#support#within#Stata#also#on\line#

BuJons*


Save dataset

Open/close file of results

Look at graphs

Open data

matrix Variables manager

Open dataset

Print files

View files

Do-file editor

Display data

matrix

Display More

output

Stop displaying

output

Stata*syntax*vs.*menus*


. command varlist



. command varlist, options



. command varlist if condition



. command variable(s) in range



. by varname: command varlist


Note#that#Stata#is#case\sensiEve#(!)# In#this#course#we#will#main#focus#on#the#ecient#use#of#Stata#syntax#and#it#use#through#.do#les#

However,#some#menus#will#also#be#reviewed#


A*prac)cal*example*

Open*a*logMle*to*save*results*.>.File.>.Log.>.Begin:.example.log# . log using example.log, replace

Open*example*dataset*.>.File.>.Example.Datasets.>.Example.datasets.installed.with.Stata:.census.dta#use##

. sysuse census, clear


A*prac)cal*example*

Describe*data*set*.>.Data.>.Describe.data.>.Describe.data.in.memory. . describe

Describe*variables*#>.Data.>.Describe.data>.Describe.data.contents:.state#region#pop#

. codebook state region pop


A*prac)cal*example*

Summary*sta)s)cs*.>.Data.>.Describe.data.>.Summary.staAsAcs. . summarize marriage divorce !>.Data.>.Describe.data.>.Summary.staAsAcs. . summarize marriage divorce if state=="Alabama"

. summarize marriage divorce if region==1 . by region, sort: summarize marriage divorce


A*prac)cal*example*

Close*the*logMle*.>.File.>.Log.>.Close. . log close


Working*with*.do*les*

Edit#and#save#all#syntax#already#available#



Create,#edit#and#Do#a#.do#le#


Do

Save: session1.do


It#is#highly#recommended#to#compartmentalize#tasks#by#creaEng#single#.do#les#for#each#task#to#be#done:#cr_dataset.do,#clean_dataset.do,#an_desc.do,#an_tests.do,#an_regressions.do,#etc.#

Create#a#master.do#le#calling#at#all#single#.do#les###. do cr_dataset.do . do clean_dataset.do . do an_descriptive.do . do an_tests.do


Types*of*les*

Datasets#(.dta)# Do#les#(.do)# Results#(.smcl#or#.log)# Graphics#(.gph)# Other#commands#(.ado)#


Upda)ng*Stata*

Looking#for#ocial#updates# . update query (contacting http://www.stata.com) Update status

Last check for updates: 04 Jan 2014 New update available: none (as of 04 Jan 2014) Current update level: 30 Oct 2013 (what's new) Possible actions

Do nothing; all files are up to date.

. update all ...#


Upda)ng*Stata*

Looking#for#addiEonal#commands# . search double hurdle


Other*resources*

Stata#CorporaEon#h

session 1 introduccion updated

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