r0005">We tested Kaldor's first and second laws for a sample of 63 countries in 1990–2011.
r0010">Kaldor's first and second laws hold; distinct results according to income levels.
r0015">Changes in value added contribute to the increase of manufacturing productivity.
r0020">Manufacturing output growth stimulate the economy's aggregate growth rate.
r0025">Manufactured exports and RER are relevant for output and productivity increases.