Economic development in Latin America has trailed most other world regions over the past four decades despite its relatively high initial development and school attainment levels. This puzzle can be resolved by considering the actual learning as expressed in tests of cognitive skills, on which Latin American countries consistently perform at the bottom. In growth models estimated across world r...

We (1) determine the number of Latin rectangles with 11 columns and each possible number of rows, including the Latin squares of order 11, (2) answer some questions of Alter by showing that the number of reduced Latin squares of order n is divisible by f ! where f is a particular integer close to 1 2 n, (3) provide a formula for the number of Latin squares in terms of permanents of (+1, −1)-mat...

Prompted by new data and a renewed concern about equality of opportunity, the study of intergenerational mobility has flourished in Latin America in the past decade. Although analysis is still restricted to a handful of countries, one conclusion appears clear: Intergenerational income mobility is weaker in Latin America than in industrial countries and is characterized by “persistence at the to...

A critical set in an n× n array is a set C of given entries, such that there exists a unique extension of C to an n× n Latin square and no proper subset of C has this property. For a Latin square L, scs(L) denotes the size of the smallest critical set of L, and scs(n) is the minimum of scs(L) over all Latin squares L of order n. We find an upper bound for the number of partial Latin squares of ...

A critical set in a Latin square of order n is a set of entries in a Latin square which can be embedded in precisely one Latin square of order n. Also, if any element of the critical set is deleted, the remaining set can be embedded in more than one Latin square of order n. In this paper we find all the critical sets of different sizes in the Latin squares of order at most six. We count the num...

In order to introduce this special issue of Contexto Internacional, we first seek to provide a panoramic understanding of the Latin American political landscape. Next, we consider the new (and not so new) development strategies adopted by Latin American states, and their implications for foreign policy and international relations. Following this, we offer a brief review of the literature on Lat...

An N2 resolvable latin squares is a latin square with no 2×2 subsquares that also has an orthogonal mate. In this paper we show that N2 resolvable latin squares exist for all orders n with n 6= 2, 4, 6, 8

IEEE Latin-American Test Workshop (LATW 06) 26-29 March 2006 Buenos Aires, Argentina The IEEE Latin-American Test Workshop provides an annual forum for test and fault tolerance professionals and technologists from Latin America and all over the world. Participants will present and discuss various aspects of system, board, and component testing and fault tolerance with respect to design, manufac...

Latin hypercube designs have been found very useful for designing computer experiments. In recent years, several methods of constructing orthogonal Latin hypercube designs have been proposed in the literature. In this article, we report some more results on Latin hypercube designs, including several new designs.

In this paper, we study the dependencies of the number of symmetric and doubly symmetric diagonal Latin squares on the order N. Using fast generator of diagonal Latin squares (augmented by symmetry checker), we determined these dependencies for order at most 8. We also found a number of doubly symmetric diagonal Latin squares of orders 12, 16 and 20.