Factor intensities vary substantially not just between, but also within industries, and this pattern remains at all levels of disaggregation. For instance, an industry sector, SITC 65 (textile yarns, fabrics, made-up articles) covers a wide variety of goods whose factor contents vary from the least human/physical capital intensive to the most capital intensive (table 24b).  This suggests that analyses of the factor content of trade, whether motivated by the empirical validation of trade models or by policy advice, should best be carried out at high degrees of disaggregation [page 26].