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The task has become increasingly more difficult as the complexity of projects increases due to statutory and regulatory changes , real estate market evolution , funding constraints and technological innovations that must be addressed by a diminishing number of experienced personnel in the public real estate workforce . The overall real costs of benefits grew by 18 percent , while real wages grew by 10 percent . The metropolitan region , formed by the seven counties that surround Barcelona , with 4.4 million inhabitants and a high level of self-contention , is the real area of analysis and planning of mobility and transport infrastructures . That 's a good use of interruption , though it will get annoying pretty fast ( just as in real life , when someone keeps cutting you off ) , so do n't stick with it for more than a page or so .