We use data on Latino children in the United States who have been randomly assigned calculation tests in English or Spanish to check for the so-called bilingual advantage, the notion that knowing more than one language improves individuals’ other cognitive skills. After controlling for different characteristics of children and their parents, as well as children's time in the US, we find a bilingual advantage among children who read or write in English and Spanish but not for those who only speak or understand both languages. In particular, bilingual readers or writers perform one-fourth to one-third of a standard deviation better than monolingual children, equal to learning gains of an additional school year. Applying the Oster test, we find that selection on unobservables would need to be 3–4 times stronger than selection on observables to explain away our results. The bilingual advantage is stronger among children in two-parent households with siblings and for those at the upper end of the ability distribution.

We develop a new design for the experimental beauty-contest game (BCG) that is suitable for children in school age and test it with 114 schoolchildren aged 9–11 years as well as with adults. In addition, we collect a measure for cognitive skills to link these abilities with successful performance in the game. Results demonstrate that children can successfully understand and play a BCG. Choices start at a slightly higher level than those of adults but learning over time and depth of reasoning are largely comparable with the results of studies run with adults. Cognitive skills, measured as fluid IQ, are predictive only of whether children choose weakly dominated strategies but are neither associated with lower choices in the first round nor with successful performance in the BCG. In the implementation of our new design of the BCG with adults we find results largely in line with behavior in the classical BCG. Our new design for the experimental BCG allows to study the development of strategic interaction skills starting already in school age.

Empirical studies on bilingual children’s reference production have often focussed on comparisons with monolingual peers. In this study, we introduce the concept of ‘reference profiles’: Speakers may exhibit similar or different behaviours in reference production, independently of whether they belong to a specific group (e.g., monolinguals or bilinguals) or whether their production adheres to some norm. Thirty-seven Greek–Italian bilingual children (Mage = 9;4, range 7;10–11;6) performed narrative retelling tasks in both of their languages, as well as vocabulary tasks and various cognitive tasks. The results show that the children had a good mastery of reference (i.e., appropriately using null pronouns, full pronouns or full nouns) in both of their languages. Using cluster analyses, we identified two distinct reference profiles. Further investigation showed that these profiles differed in both their sustained attention and in the use of overspecified referring expressions in contexts where reference to the same referent was maintained. These results are interpreted in light of current cognitive theories of (bilingual) reference processing and emphasise the potential of reference profiles for the study of other domains beyond bilingual reference production.

Using household data from Northern Ghana, this study examines how cognitive skills affect the allocation of schooling across the children of a household. The analysis reveals that relative to the rest of the siblings in the household, an increase of one standard deviation in the score of cognitive tests increases by 0.123–0.237 the number of years of schooling attended in the following four years, depending on the cognitive test used. These results are consistent with the main prediction of the theoretical model for intra-household allocation of resources developed in the seminal paper Becker (1981): parents reinforce cognitive differences between siblings through allocating more human capital resources to the more able siblings. We find larger effects for boys than for girls while they do not differ significantly among poorer and less poorer households.

We investigated cognitive and metalinguistic correlates of Chinese word reading in children with L2 Chinese learning experience and compared these to those in L1 Chinese speaking children. In total, 102 third and fourth grade children were recruited for the study. We examined a range of Chinese and English word reading related cognitive and metalinguistic skills. Compared to the native Chinese speaking group (NCSS), the non-native Chinese speaking group (NNCS) only performed better in English vocabulary knowledge and English working memory. On Chinese word reading related skills the NNCS group performed significantly worse than the NCS group. Hierarchical regression analyses revealed that the unique correlates of Chinese word reading for both groups were Chinese vocabulary, working memory, lexical tone awareness, and orthographic skills. For the NNCS group only, visual skills were also unique correlates of word reading skills. The results suggest cognitive similarities and differences in reading among native and non-native Chinese speakers.