(Reuters) -Dutch recruitment firm Randstad reported an 18% jump in second-quarter core profit on Tuesday, broadly in line with analysts’ expectations, as companies continued to compete for workers. The group’s underlying earnings before interest, taxes and amortisation (EBITA) reached 308 million euros ($315 million) in the three months to the end of June, up from 260 million euros a year earlier and in line with the 309-million-euro estimate in a company-compiled poll. “The global labor market remains dynamic with a combination of strong demand and talent scarcity,” Chief Executive Officer Sa…