When the three age groups were compared,the AUROC curve for CCI was significantly larger for patients aged < 65 years(p < 0.001) for both in-hospital and 1-year mortality. Conclusion: There were no differences in the clinical presentation of IE between the groups. Age ≥ 80 years, high comorbidity (measured by CCI),and non-performance of surgery were independent predictors of mortality in patients with IE.CCI could help to identify those patients with IE and surgical indication who present a lower risk of in-hospital and 1-year mortality after surgery, especially in the < 65-year group.

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We investigate whether monitoring the information trails generated by firms' activities improves tax compliance. We exploit quasi-experimental variation generated by a Large Taxpayers' Unit (LTU) in Spain, which devotes additional resources to verifying the transactions reported by firms with more than e6 million in reported revenue. Firms bunch below this threshold in order to avoid stricter tax enforcement, and this reaction is stronger in sectors where paper trail is easier to monitor. These results suggest that monitoring efforts by the tax authority and the traceability of information reported by firms are complements, and both are necessary for effective tax enforcement.

This paper analyzes the effects on tax compliance of monitoring the information trails generated by firms' activities. We exploit quasi-experimental variation generated by a Large Taxpayers Unit (LTU) in Spain, which monitors firms with more than 6 million euros in reported revenue. Firms strategically bunch below this threshold in order to avoid stricter tax enforcement. This response is stronger in sectors where transactions leave more paper trail, implying that monitoring effort and the traceability of information reported by firms are complements. We calculate that there would be substantial welfare gains from extending stricter tax monitoring to smaller businesses.

No abstract