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From |
Joerg Luedicke <[email protected]> |

To |
[email protected] |

Subject |
Re: st: Adding a variable to a panel dataset |

Date |
Tue, 2 Oct 2012 13:09:33 -0500 |

As I said before, you need to -reshape- your data such that you have a dataset with 77 (7 countries x 11 years each) rows and 3 variables (your country ID, year, and unemployment rate. Then you can merge by country ID and year. Have a look at -help reshape- and -help merge- and study the examples therein. Perhaps also have a look at the manual entries for these commands. J. On Tue, Oct 2, 2012 at 12:11 PM, Jason Hecht <[email protected]> wrote: > Joerg, Chris - > > I initially created the panel out of individual years. In doing so, I > did, in fact, create a new variable called "nation" that exists for > each observation in the full dataset (e.g., "China" is repeated for > each firm year observation for any firm located in China). > > So now I just need a way to get the unemployment rate for each country > (from 1998 to 2008) slotted into the appropriate firm-level panel. > > Can I use my "nation" variable to do this? I believe I should be able > to merge the 11-line dataset (with the country unemployment rates) > into the full dataset. For example, I can use "China" (a name in the > 11-line 'text' dataset) to match with "China" which also appears in > the "nation" variable in the full dataset. > > Is this the way to proceed? > > Thanks so very much for your help. > > Jason > > > On Tue, Oct 2, 2012 at 10:12 AM, Joerg Luedicke > <[email protected]> wrote: >> If I understand the problem correctly, you will need to -reshape long- >> (see -help reshape-) your country dataset. You will then need a >> country identifier that is the same in both of your datasets. If you >> don't have such an ID yet you may want to create one. Then you can >> simply merge country and firm-level data by this ID and year. >> >> J. >> >> On Mon, Oct 1, 2012 at 11:39 PM, Jason Hecht <[email protected]> wrote: >>> Chris - >>> >>> A point of clarification: >>> >>> In the example that you provided, it appears that the "wpid" file has >>> as many obs. as the "employee" file. >>> >>> My problem is that I have 7 different country dummy variables that >>> identify where the individual firm is located. However, I want to >>> create a single variable that will have the unemployment rate (from >>> 1998 to 2008) mapped into each firm's panel. >>> >>> So let's say my "wpid" is called "unrate" (a text file) which will >>> have 11 lines and 14 columns arrayed as: >>> >>> 1998 China 8.9 Fra 6.4 . . . US 5.4 >>> 1999 China 8.3 Fra 5.8 . . . US 4.5 >>> . . . . . . >>> . . . . . . >>> . . . . . . >>> 2008 China 7.2 Fra 8.2. . . US 7.5 >>> >>> where the above variables would be named as "year" "China" "RUNCChn" >>> "Fra" RUNCFra" .... "US" "RUNCUS" >>> >>> Now I would need to merge the above dataset with my analagous >>> "employee" dataset which has 155,386 firm-year panel observations >>> (firm id #'s go from 1 to 14,126 and year (1998-2008) is a variable. >>> >>> I'm not sure if your FAQ example would work because I need to merge >>> unempoyment rates for seven different countries into the firm-level >>> panels. >>> >>> I'm sorry if I am misinterpreting the FAQ example. I'm relatively new >>> to STATA and am learning how to use the programming commands. >>> >>> Kindly advise and thanks so very much for your help. >>> >>> Jason >>> >>> On Mon, Oct 1, 2012 at 7:04 AM, Christopher Baum <[email protected]> wrote: >>>> On Oct 1, 2012, at 2:33 AM, Jason wrote: >>>> >>>>> I have constructed a panel dataset containing data on +14,000 firms >>>>> from 1998 to 2008. I created a dummy variable that identifies the >>>>> country where each firm is located (i.e., China, France, Germany, >>>>> Japan, India, UK, or US). >>>>> >>>>> I now want to add the unemployment rate for each country that would >>>>> map into each firm's panel. That is, I would like a single column that >>>>> would match the country's unemployment rate to the panel of the >>>>> individual firm. >>>>> >>>>> Is there a relatively easy way to do this? >>>> >>>> This is a FAQ: >>>> >>>> http://www.stata.com/support/faqs/data-management/group-characteristics-for-subsets/ >>>> >>>> Kit >>>> >>>> >>>> Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.html >>>> An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html >>>> An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html >>>> >>>> >>>> * >>>> * For searches and help try: >>>> * http://www.stata.com/help.cgi?search >>>> * http://www.stata.com/support/faqs/resources/statalist-faq/ >>>> * http://www.ats.ucla.edu/stat/stata/ >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/faqs/resources/statalist-faq/ >>> * http://www.ats.ucla.edu/stat/stata/ >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/faqs/resources/statalist-faq/ >> * http://www.ats.ucla.edu/stat/stata/ > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Adding a variable to a panel dataset***From:*Jason Hecht <[email protected]>

**References**:**Re: st: Adding a variable to a panel dataset***From:*Christopher Baum <[email protected]>

**Re: st: Adding a variable to a panel dataset***From:*Jason Hecht <[email protected]>

**Re: st: Adding a variable to a panel dataset***From:*Joerg Luedicke <[email protected]>

**Re: st: Adding a variable to a panel dataset***From:*Jason Hecht <[email protected]>

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