@article{THESIS, recid = {12423}, author = {Da, Rui}, title = {Essays in Financial Economics}, publisher = {University of Chicago}, school = {Ph.D.}, address = {2024-06}, number = {THESIS}, pages = {156}, abstract = {This dissertation comprises four essays in financial economics. In the first essay, we conduct inference on volatility with noisy high-frequency data. The second essay proposes a semi- parametric approach to disentangling the autocovariance of equity returns at high frequency. In the third essay, we consider the limit of arbitrage arising from learning difficulty when in- vestors are facing a large number of investment opportunities. Finally, we investigate market efficiency in the presence of many investors.}, url = {http://knowledge.uchicago.edu/record/12423}, doi = {https://doi.org/10.6082/uchicago.12423}, }