The goal of the KHDS 2004 was to re-interview the sample of about 6,200 respondents from the 1991-1994 survey (which excludes 169 individuals who died over the course of the baseline rounds) (Beegle _et al.,_ 2006b). Considerable effort was made to track surviving respondents to their current location, be it in the same community (typically a village), a nearby community, within the region, or even outside the region. This is an important feature since the event being studied, marriage, is often (almost always) associated with the young person moving out of the dwelling they occupied prior to marriage.<sup>9</sup> Among the surviving children in the two gender-based age groups used here, 77 percent were located and re-interviewed, 5 percent had died and 18 percent were not located in 2004. Of those reinterviewed, 46 percent were residing outside of the baseline community. Without making an effort to track individuals who left the village, therefore, the re-contact rate would have fallen to 54 percent of the surviving children.

For this study, the subsample of interest is the group of young people who are of pre-marital age at baseline and are age-eligible for marriage by 2004. Fifteen years is the upper-bound not only for being considered of pre-marital age, but also the cut-off for defining someone as an orphan or experiencing a death of a household member. The cutoff of 15 years to define orphanhood is consistent with much of the literature in this area, although some more recent work extends the age cut-off to 18 years (see UNAIDS, 2004). The lower age bound for being in the sample are those children in the baseline who would be of marrying age by 2004. The main sample therefore consists of children ages 4-15 at baseline; by 2004, these children were between the ages of 17 and 28 -- meaning that they had all moved into “marrying” ages between the baseline and followheadship, head’s education, head’s age, land holdings, livestock holdings, and dwelling characteristics) (see CWIQ results in Krutikov and De Weerdt, 2004). Among children under 18 years, 14% in the KHDS 2004 are single or double-parent orphans and 63% of children were living with both parents. These numbers are strikingly close to results from the DHS 2003. DHS 2003 survey found that 11% of the children under 18 years old in Kagera had lost one or both parents (a number equal to rate in the Tanzanian national sample). In the DHS, 60% of children in Kagera who were under 18 years of age live with both parents.

> 9 The success of panel surveys is often measured in terms of re-contact of households, rather than individuals therein. By this measure, excluding households in which all previous members are deceased (17 households with 31 people), the KHDS 2004 survey re-contacted 93% of the baseline households (835 out of 895 households). This is an excellent rate of re-contact compared to panel surveys in low-income countries _and_ high-income countries. The KHDS panel has an attrition rate that is much lower than that of other well-known panel survey summarized in Alderman _et al_ . (2001). Notably, most of the surveys in Alderman _et al._ cover considerably shorter time periods (2 - 5 years). Refusals in the KHDS were relatively uncommon; the main reason for not re-interviewing surviving panel respondents was failure to locate the respondent.

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