using lag in cross section

[Khati Zolfaghari]

hello everyone , I am using cross-section data .
my data is contained :
--number of birth in 2020 ( monthly data )
--unemployment in 2020( monthly data )
--gdp in 2020( yearly data )
--stringency data in 2020( monthly data )

-- all of the monthly data are from January to Dec(12month)

I want to see the response of birth after lock-downing in some countries, but it is a cross-section and for 2020.

how can I use a 9-month lag of dependent variable in my regression? because assuming the lockdown happens in January, so I want to see the response after 9-month.
but in cross-section I cannot use the "tsset" to declare time series .

this is part of my dataset ":

Country    year    GDP    Country1    GDP1    id    month    birth    unem    school_closing    Workplace_closing    Cancel_publicevent
HUN    2020    -3.1    HUN    -3.1    28    April    2853    11.1    2.9333333    2    2
CONNECTICUT    2020    98.746    CONNECTICUT    98.746    12    April    2822    8.6    3    3    2
NEW YORK    2020    105.97    NEW YORK    105.97    54    April    4533        2.9333333    2.9    2
HAWAII    2020    102.967    HAWAII    102.967    26    April    10769    16.5    3    3    2
BGR    2020    -4    BGR    -4    7    April    4712    5.9    3    1    2

i am so thankful to recieve your guidance .

many thanks for your valuable time and advice .

best regards ,

[Khati Zolfaghari]

hello to everyone, I hope I receive your advice so soon. I need your assistance for the question that I mention.

To estimate the short-term impact of COVID-19 on fertility rates we use cross-sectional data for 2020 , and the following empirical specification:

yi=a+bxi+cmi+dNi+rfi+e

where yi is fertility rate for country (2020), xi is set of control variable included (GDP per capita, unemployment), NI is GDP growth , NI is average measure of covid-ristrictoins, and FI is 9month lag of fertility
[IMG]file:///C:/Users/khatereh/AppData/Local/Temp/msohtmlclip1/01/clip_image006.png[/IMG]

my data is contained :

--number of birth in 2020 ( monthly data )

--unemployment in 2020( monthly data )

--gdp and gdp per capita in 2020( yearly data )

--stringency data in 2020( monthly data )

-- all of the monthly data are from January to Dec(12month)

--my adviser told me it is cross -section but my problem is how in cross-section we use lag of dependent variable ?

I want to see the response of birth after lock-downing in some countries, but it is a cross-section and for 2020.

how can I use a 9-month lag of dependent variable in my regression? because assuming the lockdown happens in January, so I want to see the response after 9-month.
but in cross-section I cannot use the "tsset" to declare time series .



best regards.

[William Lisowski]

For cross-sectional data you will use the xtset command rather than the tsset command.