Why are you asking this? Do you want to build an ABM of a system that models stock transactions, or write a paper about how do do so, of just find a place for this class of simulation that fits your worldview?
--Doug On Fri, Aug 28, 2009 at 8:26 AM, Russ Abbott <[email protected]> wrote: > My question was simpler than that. Is there work on stocks and flows models > in which the network structure is not static? > > -- Russ > > > > On Fri, Aug 28, 2009 at 6:59 AM, Nicholas Thompson < > [email protected]> wrote: > >> All, >> >> I have tried to stay out of this discussion because I know even less about >> this subject than usual, if such a thing is possible. But ..... >> >> Russ Abbott wrote: >> >> *In a service-oriented agent-based model the agents have the ability to >> reconfigure themselves dynamically and perhaps even to add new agents and >> new stock nodes. In a stocks and flows model, the structure of the network >> static.* >> >> Which led me to wonder if there is any thing lurking in the notion of >> "self-reconfiguration" here that might be making the programing more >> difficult. What would be lost (or gained) if we replaced the words "ability >> to reconfigure themselves" with the words "sometimes are reconfigured". >> That's the thing about metaphysics: cant live with it; cant live without >> it. At the risk of saying something both controversial and >> incomprehensible, isnt the notion of self-organization literally a non >> starter because, in control theory, the control parameter, the measure by >> which the system takes stock of its own organization, is always some part or >> feature of the system, not the whole system. It's a cue. >> >> all be best, >> >> Nick >> >> Nicholas S. Thompson >> Emeritus Professor of Psychology and Ethology, >> Clark University ([email protected]) >> http://home.earthlink.net/~nickthompson/naturaldesigns/<http://home.earthlink.net/%7Enickthompson/naturaldesigns/> >> >> >> >> >> >> ----- Original Message ----- >> *From:* Russ Abbott <[email protected]> >> *To: *The Friday Morning Applied Complexity Coffee Group<[email protected]> >> *Cc: *Antony W. Iorio <[email protected]>; [email protected]; >> [email protected]; >> Lowe,Donald<[email protected]> >> *Sent:* 8/28/2009 5:49:40 AM >> *Subject:* Re: [FRIAM] Agents, stocks, and flows >> >> In a discussion with a colleague today we talked briefly about stocks and >> flows networks. It struck me that a stocks and flows model is a limited sort >> of service-oriented agent-based model. In a service-oriented agent-based >> model, agents accept inputs and produce outputs -- the simplest version >> being a supply chain. That's really a stocks and flows model in which the >> agents control the flows. Important differences are: >> >> - In an agent-based model, the agents are assumed to be autonomous in >> various ways. In a stocks and flows model the flow rates are not >> autonomous. >> The flow rates are equations that don't have the ability to change >> themselves.They are assumed to be facts about the nature of the domain >> being >> modeled. >> >> >> - In a service-oriented agent-based model the agents have the ability >> to reconfigure themselves dynamically and perhaps even to add new agents >> and >> new stock nodes. In a stocks and flows model, the structure of the network >> static. >> >> So this raises the question whether anyone knows of any work in stocks and >> flows modeling that addresses stocks and flows networks that are flexible in >> the ways just mentioned. >> >> -- Russ >> >> >> ============================================================ >> FRIAM Applied Complexity Group listserv >> Meets Fridays 9a-11:30 at cafe at St. John's College >> lectures, archives, unsubscribe, maps at http://www.friam.org >> > > > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > lectures, archives, unsubscribe, maps at http://www.friam.org >
============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
