Despite the downvotes you make a good point. The paper does not address the underlying assumption: jobs are fixed in number and type and we can only change the

Despite the downvotes you make a good point. The paper does not address the underlying assumption: jobs are fixed in number and type and we can only change the location. In reality, job markets are extremely elastic. Case in point: millions of jobs in the world exist only because a human worker is slightly cheaper than a machine at a given task.