Introduction to Labels - Econometrics - Lecture Slides, Slides of Econometrics and Mathematical Economics

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INTRODUCTION TO LABELSWorking with Data Labels, Variable Labels and

Value Labels

I

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Objectives

-^

The Objectives of this lecture are:

-^

Developing skills to ADD:– Data Label– Variable Labels– Value Labels– Looking at Value Label in Detail

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1. Adding Label to a Data Set

-^

First

load

a^

data

set

named

“personal

data

with

labels.dta”.

-^

Type ‘describe’ to see the data set and its variables.

•Note that no label is attached with the data.

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1. Adding Label to a Data Set

Now to add label to the data, do the following steps:Go to Data Menu

Æ

Select Labels

Æ

Select label data set

form the submenu.

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1. Adding Label to a Data Set

To see the attached label to the data set. Type describe in

command window.

NOTE: Now the label appears

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2. Adding Labels to Variables

Type ‘describe’ to describe the data.

Note that there are no labels attached withthe variables in your data.

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2. Adding Labels to Variables

A dialogue box appears.

Select

“Attach

a^

label

to

a^

variable”

and

in

the

variable dropdown menu Sele

ct the variable to which

you want to add a label say “id” and add a new labelas “identifier” and Click submit.

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2. Adding Labels to Variables

You can label all variables in the same manner.I labeled ‘id’ by “identifier”, ‘age’ by “age of a person”, ‘sex’

by “sex of a person” and ‘edu’ by “education of a person”. Now look at the variable window.

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3. Adding Value Labels

Two

steps

are

required

to

assign^

the

labels

to

values

of

variables. Step 1:

Define a value label.

Step 2:

Assign the Defined value label to a particular variable.

Type ‘describe’ to describethe data. Note that

no

value

labels

are attached.

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3. Adding Value Labels

Open data file named ‘personalinfo.dta’. Click Browse data to

see the data.

Note that

the

variable

‘sex’

has values 1 and 2.The 1 represents ‘male’ and 2represents ‘female’.

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3. Adding Value Labels

A dialogue box appears named “Define value labels”.

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3. Adding Value Labels

Click

“Define”

and

give

a^

label

name ‘mf’ for male and female. Click Ok.Now a new dialogue box appears.In the value write ‘1’ and in the text

option write ‘male’. Click Ok.

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3. Adding Value Labels

The resulting window should look like the one shown

below:

When all the labels are assigned,

Click Close.

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3. Adding Value Labels

Step 2: Assign value labels to variable Go to Data Menu

Æ

Select value labels

Æ

Select assign value

labels to variables.