Specialization and trade can result in shifting employment patterns what possibilities

Employment patterns become inconsistent due to specialization and trade because the qualifications needed from an applicant can change or become too specific because of the specializations. Trade can change the required knowledge needed from an applicant based on what products are being traded.

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In line with other previous and contemporaneous proposals, in 1912 the meteorologist  alfred wegener  amply described what he called continental drift, expanded in his 1915 book the origin of continents and oceans and the scientific debate started that would end up fifty years later in the theory of plate tectonics.