237 research outputs found

    The Evolution of Sherman Act Jurisdiction: A Roadmap for Competitive Federalism

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    Recent Supreme Court decisions confirm for the first time in over six decades that federal regulatory authority under the Commerce Clause truly is limited. These decisions coincide with an increasing appreciation among scholars and jurists for the concept of competitive federalism. This paper derives the implications of competitive federalism for the evolution of federal jurisdiction over trade restraints under the Sherman Antitrust Act (1890). It provides a clear and substantively reasoned jurisdictional test based on the analysis of geographic market power familiar to antitrust scholars, practitioners, and regulators in evaluating horizontal mergers. To be subject to federal antitrust jurisdiction under this test, Sherman Act defendants must control a sufficiently large share of the geographic antitrust market that their trade restraint could plausibly affect prices “in more states than one.” This test resolves a number of troubling inconsistencies in the case law on federal antitrust jurisdiction and provides a useful roadmap for how the Court can constructively realign its approach to general Commerce Clause jurisdiction. As the Court’s economic understanding of the market failure underlying a regulatory statute advances, general Commerce Clause jurisdiction should evolve to require a closer substantive nexus between the market failure and the effect on interstate commerce necessary to justify federal jurisdiction This approach will allow the Court to iterate toward an appropriate and workable balance of dual sovereignty that takes seriously the concept of competitive federalism without requiring a dramatic departure from existing constitutional precedent

    Does Soft Dollar Brokerage Benefit Portfolio Investors: Agency Problem or Solution?

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    With soft dollar brokerage, institutional portfolio managers pay brokers “premium” commission rates in exchange for rebates they use to buy third-party research. One hypothesis views this practice as a reflection of the agency problem in delegated portfolio management; another views it as a contractual solution to the agency problem that aligns the incentives of investors, managers, and brokers where direct monitoring mechanisms are inadequate. Using a database of institutional money managers, we find that premium commission payments are positively related to risk-adjusted performance, suggesting that soft dollar brokerage is a solution to agency problems. Moreover, premium commissions are positively related to management fees, suggesting that labor market competition does not punish managers for using soft dollars

    A Culturally Correct Proposal to Privatize the British Columbia Salmon Fishery

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    Canada now faces two looming policy crises that have come to a head in British Columbia. The first is long-term depletion of the Pacific salmon fishery by mobile commercial ocean fishermen racing to intercept salmon under the rule of capture. The second results from Canadian Supreme Court case law recognizing and affirming “the existing aboriginal and treaty rights of the aboriginal peoples of Canada” under Section 35(1) of the Constitution Act, 1982. This essay shows that the economics of property rights provides a joint solution to these crises that would promote the Canadian commonwealth by way of a privatization auction while respecting the tribes’ distinctive aboriginal culture

    Meta-analysis of genome-wide association studies from the CHARGE consortium identifies common variants associated with carotid intima media thickness and plaque

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    Carotid intima media thickness (cIMT) and plaque determined by ultrasonography are established measures of subclinical atherosclerosis that each predicts future cardiovascular disease events. We conducted a meta-analysis of genome-wide association data in 31,211 participants of European ancestry from nine large studies in the setting of the Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE) Consortium. We then sought additional evidence to support our findings among 11,273 individuals using data from seven additional studies. In the combined meta-analysis, we identified three genomic regions associated with common carotid intima media thickness and two different regions associated with the presence of carotid plaque (P < 5 × 10 -8). The associated SNPs mapped in or near genes related to cellular signaling, lipid metabolism and blood pressure homeostasis, and two of the regions were associated with coronary artery disease (P < 0.006) in the Coronary Artery Disease Genome-Wide Replication and Meta-Analysis (CARDIoGRAM) consortium. Our findings may provide new insight into pathways leading to subclinical atherosclerosis and subsequent cardiovascular events

    Genetic control of mRNA splicing as a potential mechanism for incomplete penetrance of rare coding variants

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    Exonic variants present some of the strongest links between genotype and phenotype. However, these variants can have significant inter-individual pathogenicity differences, known as variable penetrance. In this study, we propose a model where genetically controlled mRNA splicing modulates the pathogenicity of exonic variants. By first cataloging exonic inclusion from RNA-sequencing data in GTEx V8, we find that pathogenic alleles are depleted on highly included exons. Using a large-scale phased whole genome sequencing data from the TOPMed consortium, we observe that this effect may be driven by common splice-regulatory genetic variants, and that natural selection acts on haplotype configurations that reduce the transcript inclusion of putatively pathogenic variants, especially when limiting to haploinsufficient genes. Finally, we test if this effect may be relevant for autism risk using families from the Simons Simplex Collection, but find that splicing of pathogenic alleles has a penetrance reducing effect here as well. Overall, our results indicate that common splice-regulatory variants may play a role in reducing the damaging effects of rare exonic variants.</p

    Genetic control of mRNA splicing as a potential mechanism for incomplete penetrance of rare coding variants

    Get PDF
    Exonic variants present some of the strongest links between genotype and phenotype. However, these variants can have significant inter-individual pathogenicity differences, known as variable penetrance. In this study, we propose a model where genetically controlled mRNA splicing modulates the pathogenicity of exonic variants. By first cataloging exonic inclusion from RNA-sequencing data in GTEx V8, we find that pathogenic alleles are depleted on highly included exons. Using a large-scale phased whole genome sequencing data from the TOPMed consortium, we observe that this effect may be driven by common splice-regulatory genetic variants, and that natural selection acts on haplotype configurations that reduce the transcript inclusion of putatively pathogenic variants, especially when limiting to haploinsufficient genes. Finally, we test if this effect may be relevant for autism risk using families from the Simons Simplex Collection, but find that splicing of pathogenic alleles has a penetrance reducing effect here as well. Overall, our results indicate that common splice-regulatory variants may play a role in reducing the damaging effects of rare exonic variants.</p

    Genetic control of mRNA splicing as a potential mechanism for incomplete penetrance of rare coding variants

    Get PDF
    Exonic variants present some of the strongest links between genotype and phenotype. However, these variants can have significant inter-individual pathogenicity differences, known as variable penetrance. In this study, we propose a model where genetically controlled mRNA splicing modulates the pathogenicity of exonic variants. By first cataloging exonic inclusion from RNA-sequencing data in GTEx V8, we find that pathogenic alleles are depleted on highly included exons. Using a large-scale phased whole genome sequencing data from the TOPMed consortium, we observe that this effect may be driven by common splice-regulatory genetic variants, and that natural selection acts on haplotype configurations that reduce the transcript inclusion of putatively pathogenic variants, especially when limiting to haploinsufficient genes. Finally, we test if this effect may be relevant for autism risk using families from the Simons Simplex Collection, but find that splicing of pathogenic alleles has a penetrance reducing effect here as well. Overall, our results indicate that common splice-regulatory variants may play a role in reducing the damaging effects of rare exonic variants.</p
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