Boomerang: Rebounding the consequences of reputation feedback on crowdsourcing platforms

Paid crowdsourcing platforms suffer from low-quality workand unfair rejections, but paradoxically, most workers and requesters have high reputation scores. These inflated scores, which make high-quality work and workers difficult to find,stem from social pressure to avoid giving negative feedback. We introduce Boomerang, a reputation system for crowdsourcing that elicits more accurate feedback by rebounding the consequences of feedback directly back onto the person who gave it. With Boomerang, requesters find that their highly rated workers gain earliest access to their future tasks, and workers find tasks from their highly-rated requesters at the top of their task feed. Field experiments verify that Boomerang causes both workers and requesters to provide feedback that is more closely aligned with their private opinions. Inspired by a game-theoretic notion of incentive-compatibility, Boomerang opens opportunities for interaction design to incentivize honest reporting over strategic dishonesty

α 1 Acid glycoprotein expression in human leukocytes: Possible correlation between α 1 -acid glycoprotein and inflammatory cytokines in rheumatoid arthritis

α-Acid glycoprotein is an acute-phase reactant that becomes markedly elevated in serum during inflammation and has an immunosuppressive effect on lymphocyte fonctions. Patients with collagen diseases had significant increases of α 1 -acid glycoprotein in their serum and on the surface of peripheral leukocytes compared with controls. The levels from patients with rheumatoid arthritis were higher than those from patients with systemic lupus erythematosus, mixed connective tissue disease, and Behçet's disease. In patients with rheumatoid arthritis, the value of serum α 1 -acid glycoprotein correlated with disease activity. Among leukocyte subpopulations, monocytes showed more α 1 -acid glycoprotein on their surface than polymorphonuclear leukocytes; and lymphocytes. The cell surface expression of α 1 -acid glycoprotein on cultured monocytes surface peaked after 48 h. Interleukin-1 β and tumor necrosis factor-α stimulated the production of α 1 -acid glycoprotein RNA message in peripheral blood mononuclear cells over 18–24 h during cell culture. The results show that serum α 1 -acid glycoprotein reflects systemic disease activity in rheumatoid arthritis. Furthermore, monocytes may serve as a source of production of α 1 -acid glycoprotein.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/44509/1/10753_2004_Article_BF00916390.pd