Commissioned Paper

Appendix 4
Commissioned Paper: Michael Shanahan

To: Steven J. Ingels

Re: Education Longitudinal Study, (Third Follow-up, 2012)

From: Michael J. Shanahan, mjshan@unc.edu

Date: June 3, 2010

Purpose: The purpose of this memo is to discuss measures of adult transition markers and related measures for possible inclusion in the Third Follow-up of the Education Longitudinal Study (ELS).

TABLE OF CONTENTS

Scope and Procedures 4

I. Traditional Demographic Markers 5

A. Education 5

B. Family and Household Composition 6

C. Employment and Finances 9

II. Subjective Aspects of the Transition to Adulthood 15

A. Educational/Occupational Careers 15

B. Subjective Social Status 17

C. Values 18

D. Obstacles in Careers 19

E. Future Circumstances 20

F. Perceived Adult Status 23

G. Timeliness of Transition Markers 24

III. Summary of Recommendations 25

A. Traditional Demographic Markers 25

B. Subjective Assessments for Possible Inclusion 26

Appendix A. Military Service Measures from Add Health 27

Scope and Procedures

Scope: Possibly relevant measures may be classified into four broad categories. First, the traditional demographic markers of adulthood (school completion, marriage, parenthood, start of first job for pay in career-line, establishment of one’s own household). Second, subjective aspects of these markers, including, for example, self-perceived adulthood, future plans, and perceived reasons for one’s pathway. Third, relatively newer concerns that elucidate the transition to adulthood: intergenerational assistance, experiences with the military, and finances beyond assets, for example. Fourth and finally, Steven asked me to consider missing gaps in previous surveys.

The document is organized into Traditional Markers and Subjective Assessments and the third and fourth categories of measures are integrated into these two sections.

Procedures: The average age of the sample at the Third Follow-up will be 26 years old and the time lag since the Second Follow-up will be about six years. I have reviewed previous instruments used by the ELS, NELS88:2002 (which assessed respondents with an average age of 26), the National Longitudinal Study of Adolescent Health (Add Health) Waves III and IV (covering 18-26 and 24-32 years old, respectively), and the Youth Development Study (YDS) Waves 12 (2000) and 13 (2002) (covering ages 26 and 27). (The Panel Study of Income Dynamics and the National Longitudinal Survey are much less relevant given the years of administration and the age of the respondents.) When possible I have included frequency distributions for recommended measures as they have been used already in national probability samples.

The durations between Waves II and III and between III and IV of Add Health are both roughly 6 years. NELS88:2000 also occurred approximately 6 years after the previous wave of data collection in 1994.

Given the focus, comparable lag, and recency of these studies, Add Health III and IV and NELS88:2000 are most relevant to the present circumstances. As will be seen, the Youth Development Study has used some subjective measures that may also be of interest.

I. Traditional Demographic Markers

A life-history calendar approach represents a straightforward and highly valuable method to collect these data, providing a month-by-month account of one’s roles with respect to school, work, and family living arrangements. The resulting data are quite rich and allow for different longitudinal modeling possibilities. However, this approach may not be feasible in the present case given the substantial time that has elapsed (6 years) since the last wave of data collection in 2006. (By comparison, the Youth Development, which uses the life-history calendar method, typically had one or two years between data collection points). It is unlikely that respondents could reliably and validly recall and record their work, family, and school involvements across 72 consecutive months.

A. Education

1. Add Health. Waves III (Q. Section 7) and IV (Q. Section 9) focus on educational histories—highest level attained, degrees and certificates, and the dates of these degrees and certificates.

Wave III includes detailed histories of vocational training and/or job training programs: type of institution, field of study, date of any degrees. Few people reported attending more than two such programs since the last wave.

Wave IV includes an item about help from relatives and also an item tapping the respondent’s subjective assessment of educational attainment.

2. NELS88:2000. NELS draws on responses from the previous wave (1994) to then inquire about on-the-job training, several items about GEDS, specific names and dates of all schools attended, degrees and certificates received, majors or programs of study, cumulative GPA, primary reason for enrolling, reasons for leaving, future educational plans, expected degrees or certificates, recent continuing education. Pp. 15-60.

Recommendation: (R1) NELS is a superior protocol because it provides greater detail with respect to institutions attended, coursework, and performance. (R2) There is now considerable interest in familial support, so the item (H4ED7) from Wave IV of Add Health would be a potentially valuable addition. The item appears immediately below with observed frequencies. (The subjective item is discussed in section II below).

Given the time that will have elapsed between the Second and Third Follow-Up, it may be desirable to change the question to assess the % contribution to educational expenses after high school that were received from parents or any other relatives, including in-laws and step-parents.

B. Family and Household Composition

1. Add Health. Wave III (Section 2) collects household roster and number of geographic moves; marital history and values (Section 14); completed and current pregnancies and live births (Sections 22-24). Wave IV collects marital histories, pregnancies, live births (Sections 16, 17, and 19). For current parents, there are 4 subjective assessments of the parent role (tapping happiness, with parenthood closeness to children, children as major source of stress, overwhelmed by parenthood). Both waves inquire about group quarters (current) and homelessness (ever, current).

2. NELS88:2000. NELS collects marital histories and dates, children and dates (apparently first and last only), current household composition and dependents. Pp. 60-63. There is one item on housing status (living quarters) (p. 66-67).

Recommendation: (R3) The NELS protocol to update marital history and household composition and dependents is adequate. (R4) It would be useful to determine the birth dates of all children. (R5) It would be useful to determine residential histories—where R has lived and when (see H4HR10, 11MA, and 11YA from Add Health Wave IV below) given interest in geographic mobility. (R6) It would be useful to know the type of residence occupied (see H4HR1 and 2 from Add Health Wave IV below). (R7) Collection of addresses would allow the linking of participant to their local neighborhood (a geographic area), typically a census defined area such as a census blockgroup or census tract as well as for Zone Improvement Plan code areas (better known as ZIP codes). By way of geocoding, R could then be linked to a great deal of information (including an enhanced view of R’s socioeconomic status) about the neighborhood from the Decennial Census and the American Community Survey.

table continues with additional years…

these two questions are repeated until all moves accounted for

C. Employment and Finances

1. Add Health. Wave III (Section 8) collects start-stop dates and pay of first job, number of jobs held until current job, current job start-stop dates, wages etc., job classification, satisfaction, and military: branches, rank, start-stop dates.

Wave III (Section 15) covers finances: sources of personal income, earnings, total gross personal income, total gross household income, ownership of major assets, financial instruments, household negative financial events, extensive battery on public assistance.

Wave IV collections information about military service (Section 10): rank, branch, start-stop date, and combat experiences; this section also requests permission to access military records. Section 11 collects information about the labor market: information about first job, number of jobs to the present, current job: start-stop dates, job classification, benefits and hours, satisfaction, routinization, control(autonomy), work-family connections. Section 12 covers finances: total household and personal gross income, equity in home, total value of all assets excluding home equity, total debt excluding mortgage, total estimated household debt, negative financial events, government assistance, subjective social status.

2. NELS88: 2000 (pp. 1-16) collects current jobs, if unemployed last job and whether looking for work, with respect to current primary job: title, duties, employer, business, duties, occupation and industrial codes, how found, earnings, hours worked, satisfaction, control (or autonomy), numeracy, literacy, computers; planned job at age 30.

With respect to finances (pp. 63-66): personal annual gross income, Personal earnings, spousal earnings, personal and spousal other sources of income, personal gross annual earnings in previous 2 years and annual incomes, public assistance status and type received, health insurance and retirement program.

3. Youth Development Study. Month-by-month employment history, work values (importance of work attributes), sources of influences on career, sources of interference with career in past and future, payrate. For primary current job: how found, weekly work schedule, on-job training, control (autonomy), supervisory status, people/data/things, work stress, role overload, work involvement, coping strategies at work, relationships at work.

With respect to finances: sources that covered one’s expenses; perceived financial difficulties; annual income, health insurance and retirement program.

4. Recommendations. (R8) The NELS protocol pp.1-16 and 63-66 effectively covers much essential information about jobs and finances. (R9) Data should be collected on military service—branch, rank, start-stop dates, and exposures to combat. See Section 10 of Add Health Wave IV, in Appendix A (p. 25 et seq.). (R10) An assessment of personal and household debt would supplement the NELS protocol with its emphasis on income to allow for a calculation of wealth. See possible items from Add Health, appear immediately below: H4EC5, 8, and 9. (R11) An assessment of negative financial household events and perceived financial stress supplements this relatively objective information, which is advisable since these few items cannot capture the full complexity of a household economy. See possible items from Add Health immediately below. H4EC10-15. (R12). A single item assessing financial gifts would inform studies of intergenerational transfers, which of current interest. See item below, H4EC6.

II. Subjective Aspects of the Transition to Adulthood

Interest in subjective aspects of the transition to adulthood has grown considerably in the past decade. Many of these measures have not been used in national probability samples and it unclear how many of them are related to “objective” indicators of consequential behaviors and health.

However, the measures of the transition markers in NELS88:2000 could be supplemented with subjective assessments of adult transition markers that have been used in prior studies and that are the subject of scholarly interest. I would recommend the following for consideration:

A. Educational/Occupational Careers

(R13) Subjective Assessment of Educational Attainment & Occupational Career (Add Health)

Continues, next page

B. Subjective Social Status

(R14) Subjective Social Status, as implemented recently by Add Health, Wave IV H4EC19. This measure is perhaps the most well-established of the measures discussed in this section and has been used extensively to study health.

C. Values

(R15) Values—use Item 54 from the ELS Student Base Year Questionnaire (see below). This scale is commonly used (e.g., Youth Development Study; a subset appear in NELS88:94) and there are major modeling advantages to having the same items repeated across two measurement occasions.

D. Obstacles in Careers

(R16). Perceived sources of obstacles in educational and occupational careers. The second follow-up of ELS (Question Stems of Instruments, p. 7) included items assessing perceived obstacles that interfered with attaining one’s educational goals. These items could be repeated for Rs who have continued their educations since the last follow-up. Additionally, similar items could be included for occupational career. The following scale appeared in the Youth Development Study and includes reference to the past and anticipated future.

E. Future Circumstances

(R17). Future Circumstances. Several items will likely tap educational and career goals (see R13). The following items appear in Add Health Wave III.

F. Perceived Adult Status

(R18) Perceived adulthood. There is a great deal of interest in “emerging adulthood,” but there is no accepted measure and no measure that has demonstrated validity and reliability. (The major limitation appears to be that emerging adulthood is, at its core, defined in terms of role experimentation and lack of commitment, which are difficult to measure.) Item I5 immediately below, from the Youth Development Study, taps feeling like an adult.

G. Timeliness of Transition Markers

(R19) Timeliness of Transition Markers. The Youth Development also used a novel measure of perceived timing of transitions, I6 immediately below.

III. Summary of Recommendations

A. Traditional Demographic Markers

(R1) NELS88:2000 (pp. 15-60) is a superior protocol to assess educational careers because it provides greater detail with respect to institutions attended, coursework, and performance.

(R2) There is now considerable interest in familial support for educational expenses, so the item (H4ED7) from Wave IV of Add Health (Section 9) would be a potentially valuable addition.

(R3) The NELS protocol to update marital history and household composition and dependents is adequate.

(R4) It would be useful to determine the birth dates of all children.

(R5) It would be useful to determine residential histories—where R has lived and when (see H4HR10, 11MA, and 11YA from Add Health Wave IV) given interest in geographic mobility.

(R6) It would be useful to know the type of residence occupied (see H4HR1 and 2 from Add Health Wave IV below).

(R7) Collection of addresses would allow the linking of participant to their local neighborhood (a geographic area), typically a census defined area such as a census blockgroup or census tract as well as for Zone Improvement Plan code areas (better known as ZIP codes). By way of geocoding, R could then be linked to a great deal of information (including an enhanced view of R’s socioeconomic status) about the neighborhood from the 2010 Decennial Census and the American Community Survey.

(R8) The NELS protocol pp.1-16 and 63-66 effectively covers much essential information about jobs and finances.

(R9) Data should be collected on military service—branch, rank, start-stop dates, and exposures to combat. See Section 10 of Add Health Wave IV, in Appendix A.

(R10) An assessment of personal and household debt would supplement the NELS protocol with its emphasis on income to allow for a calculation of wealth. See possible items from Add Health, appear immediately below: H4EC5, 8, and 9.

(R11) An assessment of negative financial household events and perceived financial stress supplements this relatively objective information, which is advisable since these few items cannot capture the full complexity of a household economy. See possible items from Add Health immediately below. H4EC10-15.

(R12) A single item assessing financial gifts would inform studies of intergenerational transfers, which of current interest. See item H4EC6.

B. Subjective Assessments for Possible Inclusion

(R13) Subjective Assessment of Educational Attainment & Occupational Career (Add Health)

(R14) Subjective Social Status, as implemented recently by Add Health, Wave IV H4EC19.

(R15) Values—use Item 54 from the ELS Student Base Year Questionnaire (see below).

(R16). Perceived sources of obstacles in educational and occupational careers. The second follow-up of ELS (Question Stems of Instruments, p. 7) included items assessing perceived obstacles that interfered with attaining one’s educational goals. These items could be repeated for Rs who have continued their educations since the last follow-up. Additionally, similar items could be included for occupational career (see D5, Youth Development Study, above).

(R17). Future Circumstances. Several items will likely tap educational and career goals (see R13). Additionally, Add Health III included items gauging the subjectively assessed probability of future circumstances, H3EC56-61 (above).

(R18) Perceived adulthood, see Youth Development Study section I5 (above).

(R19) Timeliness of Transition Markers, see Youth Development Study section I6 (above).

Appendix A. Military Service Measures from Add Health

Wave IV Section 10: Military

Number of observations: 15,701

The next questions are about military service.
H4MI1 Num 1. Have you ever been in the military?
Frequency Percent Value Label
14589 92.9% 0 no
1112 7.1% 1 yes

If Q.1 = 1, ask Q.2, else skip to Section 11.
H4MI2 Num 2. Was your military service in the US, outside the US, or both?
Frequency Percent Value Label
511 3.3% 1 service in the US
23 0.1% 2 service outside the US
578 3.7% 3 both
14589 92.9% 7 legitimate skip

H4MI3 Num 3. Are you currently serving in the military?
Frequency Percent Value Label
761 4.8% 0 no
351 2.2% 1 yes
14589 92.9% 7 legitimate skip

If Q.1 = 1 or Q.3 = 1, ask Q.4, else go to Section 11.
4. In which branches of the military have you served? You may select more than one answer.
H4MI4A Num 4A. Army
Frequency Percent Value Label
2
603 3.8% 0 not selected
508 3.2% 1 selected
14589 92.9% 7 legitimate skip
1 0.0% 8 don’t know

H4MI4B Num 4B. Air Force
Frequency Percent Value Label
936 6.0% 0 not selected
175 1.1% 1 selected
14589 92.9% 7 legitimate skip
1 0.0% 8 don’t know

H4MI4C Num 4C. Marine Corps
Frequency Percent Value Label
932 5.9% 0 not selected
179 1.1% 1 selected
14589 92.9% 7 legitimate skip
1 0.0% 8 don’t know

H4MI4D Num 4D. Navy
Frequency Percent Value Label
862 5.5% 0 not selected
249 1.6% 1 selected
14589 92.9% 7 legitimate skip
1 0.0% 8 don’t know

H4MI4E Num 4E. Coast Guard
Frequency Percent Value Label
1091 6.9% 0 not selected
3
20 0.1% 1 selected
14589 92.9% 7 legitimate skip
1 0.0% 8 don’t know

If C_TOTMIL > 1 and Q.3 = 1, ask Q.5, else skip to Q.6.*
H4MI5 Num 5. In which branch are you currently serving?
Frequency Percent Value Label
11 0.1% 1 Army
3 0.0% 2 Air Force
2 0.0% 4 Navy
15685 99.9% 7 legitimate skip

6. In which components of the military have you served? You may select more than one answer.
H4MI6A Num 6A. Active duty
Frequency Percent Value Label
175 1.1% 0 not selected
935 6.0% 1 selected
14589 92.9% 7 legitimate skip
2 0.0% 8 don’t know

H4MI6B Num 6B. Reserves
Frequency Percent Value Label
899 5.7% 0 not selected
211 1.3% 1 selected
14589 92.9% 7 legitimate skip
2 0.0% 8 don’t know

H4MI6C Num 6C. National Guard
4
Frequency Percent Value Label
961 6.1% 0 not selected
149 0.9% 1 selected
14589 92.9% 7 legitimate skip
2 0.0% 8 don’t know

If C_TOTCOM > 1 and Q.3 = 1, ask Q.7, else skip to Q.8.*
H4MI7 Num 7. In which component are you currently serving?
Frequency Percent Value Label
27 0.2% 1 active duty
36 0.2% 2 reserves
23 0.1% 3 National Guard
15615 99.5% 7 legitimate skip

H4MI8M Num 8M. In what month and year did your first military service begin?
[Month]
Frequency Percent Value Label
87 0.6% 1 January
79 0.5% 2 February
52 0.3% 3 March
55 0.4% 4 April
91 0.6% 5 May
145 0.9% 6 June
122 0.8% 7 July
127 0.8% 8 August
119 0.8% 9 September
97 0.6% 10 October
73 0.5% 11 November
5
52 0.3% 12 December
2 0.0% 96 refused
14589 92.9% 97 legitimate skip
11 0.1% 98 don’t know

H4MI8Y Num 8Y. In what month and year did your first military service begin?
[Year]*
Frequency Percent Value Label
1 0.0% 1993 1993
13 0.1% 1994 1994
85 0.5% 1995 1995
150 1.0% 1996 1996
170 1.1% 1997 1997
144 0.9% 1998 1998
146 0.9% 1999 1999
137 0.9% 2000 2000
82 0.5% 2001 2001
60 0.4% 2002 2002
43 0.3% 2003 2003
34 0.2% 2004 2004
19 0.1% 2005 2005
13 0.1% 2006 2006
6 0.0% 2007 2007
5 0.0% 2008 2008
2 0.0% 9996 refused
14589 92.9% 9997 legitimate skip
2 0.0% 9998 don’t know

6
If respondent is currently serving (Q.3 = 1), skip to Q.10.
H4MI9M Num 9M. In what month and year did your most recent military service end?
[Month]
Frequency Percent Value Label
59 0.4% 1 January
60 0.4% 2 February
60 0.4% 3 March
52 0.3% 4 April
48 0.3% 5 May
74 0.5% 6 June
70 0.4% 7 July
74 0.5% 8 August
80 0.5% 9 September
68 0.4% 10 October
46 0.3% 11 November
53 0.3% 12 December
2 0.0% 96 refused
14940 95.2% 97 legitimate skip
15 0.1% 98 don’t know

H4MI9Y Num 9Y. In what month and year did your most recent military service end?
[Year]*
Frequency Percent Value Label
1 0.0% 1994 1994
3 0.0% 1995 1995
14 0.1% 1996 1996
23 0.1% 1997 1997
36 0.2% 1998 1998
7
70 0.4% 1999 1999
68 0.4% 2000 2000
89 0.6% 2001 2001
70 0.4% 2002 2002
80 0.5% 2003 2003
74 0.5% 2004 2004
80 0.5% 2005 2005
66 0.4% 2006 2006
65 0.4% 2007 2007
17 0.1% 2008 2008
2 0.0% 9996 refused
14940 95.2% 9997 legitimate skip
3 0.0% 9998 don’t know

H4MI10 Num 10. What is the highest military rank you have achieved?
Frequency Percent Value Label
61 0.4% 1 E-1
49 0.3% 2 E-2
139 0.9% 3 E-3
360 2.3% 4 E-4
293 1.9% 5 E-5
115 0.7% 6 E-6
11 0.1% 7 E-7
2 0.0% 8 E-8
13 0.1% 11 O-1
3 0.0% 12 O-1E
10 0.1% 13 O-2
8
1 0.0% 14 O-2E
38 0.2% 15 O-3
4 0.0% 16 O-3E
2 0.0% 24 W-1
1 0.0% 25 W-2
1 0.0% 96 refused
14589 92.9% 97 legitimate skip
9 0.1% 98 don’t know

If active duty is selected in Q.6, ask Q.11, else skip to next section.
H4MI11Y Num 11Y. What is the total amount of time you (have) served on active
duty? [Years]*
Frequency Percent Value Label
97 0.6% 0 0 years
68 0.4% 1 1 year
90 0.6% 2 2 years
119 0.8% 3 3 years
210 1.3% 4 4 years
55 0.4% 5 5 years
80 0.5% 6 6 years
47 0.3% 7 7 years
57 0.4% 8 8 years
30 0.2% 9 9 years
43 0.3% 10 10 years
18 0.1% 11 11 years
17 0.1% 12 12 years
4 0.0% 13 13 years
14766 94.0% 97 legitimate skip
9

H4MI11M Num 11M. What is the total amount of time you (have) served on active
duty? [Months]*
Frequency Percent Value Label
413 2.6% 0 0 months
39 0.2% 1 1 month
54 0.3% 2 2 months
44 0.3% 3 3 months
51 0.3% 4 4 months
29 0.2% 5 5 months
128 0.8% 6 6 months
29 0.2% 7 7 months
30 0.2% 8 8 months
44 0.3% 9 9 months
42 0.3% 10 10 months
32 0.2% 11 11 months
14766 94.0% 97 legitimate skip

H4MI12Y Num 12Y. What is the total amount of time you (have) served in a combat
zone? [Years]*
Frequency Percent Value Label
676 4.3% 0 0 years
171 1.1% 1 1 year
53 0.3% 2 2 years
24 0.2% 3 3 years
4 0.0% 4 4 years
3 0.0% 6 6 years
1 0.0% 7 7 years
1 0.0% 8 8 years
10
1 0.0% 12 12 years
1 0.0% 15 15 years
14766 94.0% 97 legitimate skip

H4MI12M Num 12M. What is the total amount of time you (have) served in a combat
zone? [Months]*
Frequency Percent Value Label
621 4.0% 0 0 months
29 0.2% 1 1 month
23 0.1% 2 2 months
37 0.2% 3 3 months
29 0.2% 4 4 months
11 0.1% 5 5 months
101 0.6% 6 6 months
20 0.1% 7 7 months
27 0.2% 8 8 months
15 0.1% 9 9 months
14 0.1% 10 10 months
8 0.1% 11 11 months
14766 94.0% 97 legitimate skip

If C_TOTTIM = 0, skip to Q.17.*
The next set of questions refers to your combat deployment. If you were deployed to a combat
zone more than once, think about all your combat deployments as you answer these questions.
H4MI13 Num 13. During your combat deployment, how many times did you engage
the enemy in a firefight?
NOTE: Smallest 5 and largest 5 values are displayed.
Frequency Percent Value Label
235 1.5% 0 0 times
32 0.2% 1 1 time
11
27 0.2% 2 2 times
12 0.1% 3 3 times
11 0.1% 4 4 times
108 0.7% 5-500 NOTE: Range of values omitted from display
1 0.0% 666 666 times
4 0.0% 995 not asked on pretest
4 0.0% 996 refused
15262 97.2% 997 legitimate skip
5 0.0% 998 don’t know

H4MI14 Num 14. During your combat deployment, did you ever kill or think you killed
someone?
Frequency Percent Value Label
272 1.7% 0 no
154 1.0% 1 yes
7 0.0% 6 refused
15262 97.2% 7 legitimate skip
6 0.0% 8 don’t know

H4MI15 Num 15. During your combat deployment, were you wounded or injured?
Frequency Percent Value Label
385 2.5% 0 no
52 0.3% 1 yes
1 0.0% 6 refused
15262 97.2% 7 legitimate skip
1 0.0% 8 don’t know

16. During your combat deployment, did you see anyone wounded, killed, or dead? Select all that apply.
H4MI16A Num 16A. Yes, coalition or ally
12
Frequency Percent Value Label
215 1.4% 0 not selected
220 1.4% 1 selected
3 0.0% 6 refused
15262 97.2% 7 legitimate skip
1 0.0% 8 don’t know

H4MI16B Num 16B. Yes, enemy
Frequency Percent Value Label
277 1.8% 0 not selected
158 1.0% 1 selected
3 0.0% 6 refused
15262 97.2% 7 legitimate skip
1 0.0% 8 don’t know

H4MI16C Num 16C. Yes, civilian
Frequency Percent Value Label
310 2.0% 0 not selected
125 0.8% 1 selected
3 0.0% 6 refused
15262 97.2% 7 legitimate skip
1 0.0% 8 don’t know

H4MI16D Num 16D. No
Frequency Percent Value Label
284 1.8% 0 not selected
151 1.0% 1 selected
3 0.0% 6 refused
13
15262 97.2% 7 legitimate skip
1 0.0% 8 don’t know

We would like to obtain information from your military service record, including information on your military education, dates and geographic locations of service, and participation in military battles and engagements. This information will help us learn more about pathways into the military and the effects of military service on family formation and health. We will not request your medical records. In order to obtain your service record we will need your Social Security number. Would you provide your Social Security number so we can request your military service record? (Your Social Security number will be treated as confidential and used only for the purpose of obtaining your military service record.)

H4MI17 Num 17. Would you provide your social security number?
Frequency Percent Value Label
426 2.7% 0 no
667 4.2% 1 yes
15 0.1% 5 not asked on pretest
4 0.0% 6 refused
14589 92.9% 7 legitimate skip

*H4MI8Y
Includes soft check if year < 1994: “Please confirm the year in which most recent military service began.”

*H4MI9Y
Includes soft check if year < 1994: “Please confirm the year in which most recent military service ended.”

*H4MI11Y, H4MI11M
Includes soft check if years > 18 or if years + months total to > 18: “Please confirm the total amount of time served on active duty.”

*H4MI12Y, H4MI12M
Includes soft check if years > 18 or if C_TOTTIM > 216: “Please confirm the total amount of time served in a combat zone.”

*C_ACTIDUTY, C_TOTMIL, C_TOTCOM, C_TOTTIM
Several variables used in the skip instructions of this and other sections were created as follows.

Variable
C_ACTIDUTY
Value is 1 if respondent is currently on active duty military service: H4MI3=yes and
((H4MI6A=Active Duty ONLY and H4MI7=blank) or (H4MI7=Active Duty))
C_TOTMIL Sum of counts of: H4MI4A, H4MI4B, H4MI4C, H4MI4D, H4MI4E
C_TOTCOM Sum of counts of: H4MI6A, H4MI6B, H4MI6C
C_TOTTIM Number of months + number of years (converted to months) in a combat zone:
H4MI12M + H4MI12Y

4-1