We study market-making high-frequency trader (HFT) dynamics around large institutional trades in Canadian equities markets using order-level data with masked trader identification. Following a regulatory change that negatively affected HFT order activity, we find that bid-ask spreads increased and price impact decreased for institutional trades. The decrease in price impact is strongest for informed institutional traders. During institutional trade executions, HFTs submit more same-direction orders and increase their inventory mean reversion rates. Our evidence indicates that high-frequency trading is associated with lower transaction costs for small, uninformed trades and higher transaction costs for large, informed trades.Received May 24, 2016; editorial decision June 21, 2018 by Editor Andrew Karolyi.

We study the effect of the US Affordable Care Act (ACA) on healthcare borrowing costs. The ACA provides insurance subsidies to low-income enrollees. States could accept funding to expand Medicaid, although many declined, citing the cost burden. The ACA significantly reduced healthcare yields after a favorable 2012 Supreme Court ruling. Furthermore, hospital investment spending increased, and investment-cash flow sensitivities decreased. The yield effect was double in Medicaid expansion states, and insignificant in rural areas of non-expansion states. Our results highlight how the municipal market can be used to evaluate the heterogeneous effects of public policy and guide a targeted policy approach.

We examine how local newspaper closures affect public finance outcomes for local governments. Following a newspaper closure, municipal borrowing costs increase by 5–11 basis points, costing the municipality an additional $650,000 per issue. This effect is causal and not driven by underlying economic conditions. The loss of government monitoring resulting from a closure is associated with higher government wages and deficits and increased likelihoods of costly advance refundings and negotiated sales. Overall, our results indicate that local newspapers hold their governments accountable, keeping municipal borrowing costs low and ultimately saving local taxpayers money.

Policies on financially distressed municipalities differ across US states, with some allowing unconditional access to Chapter 9 bankruptcy (Chapter 9 states) and others having proactive policies to assist distressed municipalities (Proactive states). These differences significantly affect borrowing costs. In Chapter 9 states, local municipal bond yields are higher, more cyclical, and more sensitive to default events than Proactive states. Default events have a contagion effect in Chapter 9 states, but not Proactive states. Lower local borrowing costs in Proactive states come at the expense of the state via higher intergovernmental revenue transfers in times of weak economic conditions.